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ZAKHAROV, Y. V.
THE ENERGY-SPECTRUM OF CONDUCTION ELECTRONS IN A FERROMAGNET WITH DOMAIN-STRUCTURE / Y. V. ZAKHAROV, L. S. TITOV // Solid State Commun. - 1985. - Vol. 53, Is. 5. - P. 447-450, DOI 10.1016/0038-1098(85)91054-3. - Cited References: 8 . - ISSN 0038-1098

РУБ Physics, Condensed Matter

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Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
Доп.точки доступа:
TITOV, L. S.
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Wigner function description of ac transport through a two-dimensional quantum point contact / I. E. Aronov [et al.] // J. Phys.: Condens. Matter. - 1997. - Vol. 9, Is. 24. - P. 5089-5103, DOI 10.1088/0953-8984/9/24/009. - Cited References: 45 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
QUANTIZED CONDUCTANCE
   BALLISTIC-RESISTANCE
   CONSTRICTION
   CAPACITANCE
   ADMITTANCE
   ELECTRONS
   SYSTEMS
   FIELD
   PUMP
Аннотация: We have calculated the admittance of a two-dimensional quantum point contact (QPC) using a novel variant of the Wigner distribution function (WDF) formalism. In the semiclassical approximation, a Boltzmann-like equation is derived for the partial WDF describing both propagating and non-propagating electron modes in an effective potential generated by the adiabatic QPC. We show that this quantum kinetic approach leads to the well known stepwise behaviour of the real part of the admittance (the conductance), and of the imaginary part of the admittance (the emittance), in agreement with the latest results derived by Christen and Buttiker, which is determined by the number of propagating electron modes. It is shown that the emittance is sensitive to the geometry of the QPC, and can be controlled by the gate voltage. We have established that the emittance has contributions corresponding to both quantum inductance and quantum capacitance. Stepwise oscillations in the quantum inductance are determined by the harmonic mean of the velocities for the propagating modes, whereas the quantum capacitance is a significant mesoscopic manifestation of the nonpropagating (reflecting) modes.

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Держатели документа:
LOS ALAMOS NATL LAB,CNLS,LOS ALAMOS,NM 87545
UKRAINIAN ACAD SCI,INST RADIOPHYS & ELECT,UA-310085 KHARKOV,UKRAINE
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
ИФ СО РАН
Theoretical Division, CNLS, Los Alamos National Laboratory, Los Alamos, NM 87545, United States
Inst. Radiophysics and Electronics, Natl. Academy of Sciences of Ukraine, 12 Acad Proskura Street, 310085, Kharkov, Ukraine
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Department of Physics, Univ. Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801-3080, United States

Доп.точки доступа:
Aronov, I. E.; Berman, G. P.; Campbell, D. K.; Dudiy, S. V.
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Wavelength- and angle-selective photodetectors enabled by graphene hot electrons with Tamm plasmon polaritons / C.-H. Huang, C.-H. Wu, R. G. Bikbaev [et al.] // Nanomaterials. - 2023. - Vol. 13, Is. 4. - Ст. 693, DOI 10.3390/nano13040693. - Cited References: 50. - This work is supported by the Higher Education Sprout Project of the National Yang Ming Chiao Tung University, National Tsing Hua University, Ministry of Education and the National Science and Technology Council (NSTC 110-2221-E-007-130-MY3; 109-2628-E-007-003-MY3; 111-2923-E-007-008-MY3; 111-2628-E-007-021; 111-2119-M-A49-006). This research was funded by the Russian Science Foundation (project no. 22-42-08003) . - ISSN 2079-4991
Кл.слова (ненормированные):
2D material -- Tamm plasmon polariton -- distributed Bragg reflector -- graphene -- photodetectors -- wavelength and angle selectivity -- LiDAR
Аннотация: Recently, two-dimensional materials have attracted attention owing to their special optical characteristics and miniaturization, with low thickness as well as extremely high responsivity. Additionally, Tamm plasmon polariton (TPP) resonance can be observed by combining a metal film and a one-dimensional (1D) photonic crystal (PC), where an electric field confinement is located at the metal–1D PC interface. In this study, a graphene layer combined with a TPP is proposed as a wavelength- and angle-selective photodetector. The graphene layer is located where the strong field confinement occurs, and the photocurrent response is significantly enhanced with increasing absorption by over four times (from 62.5 μA⋅W−1 to 271 μA⋅W−1 and undetected state to 330 μA⋅W−1 in two different samples). Moreover, the graphene–TPP photodetector has wavelength and angle selectivity, which can be applied in LiDAR detecting, sun sensors, laser beacon tracking, and navigational instruments in the future.

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Держатели документа:
Institute of Photonic System, National Yang Ming Chiao Tung University, 301 Sec. 2, Gaofa 3rd Road, Tainan 711010, Taiwan
College of Photonics, National Yang Ming Chiao Tung University, 301 Sec. 2, Gaofa 3rd Road, Tainan 711010, Taiwan
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Siberian Federal University, 660041 Krasnoyarsk, Russia
Institute of Imaging and Biomedical Photonics, National Yang Ming Chiao Tung University, 301 Sec. 2, Gaofa 3rd Road, Tainan 711010, Taiwan
Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan

Доп.точки доступа:
Huang, Cheng-Han; Wu, Chia-Hung; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Ye, Ming-Jyun; Chen, Chi-Wen; Wang, Tung-Jung; Timofeev, I. V.; Тимофеев, Иван Владимирович; Lee, Wei; Chen, Kuo-Ping
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Wannier-Stark states of a quantum particle in 2D lattices / M. . Gluck [et al.] // Phys. Rev. Lett. - 2001. - Vol. 86, Is. 14. - P. 3116-3119, DOI 10.1103/PhysRevLett.86.3116. - Cited References: 18 . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
BLOCH PARTICLE
   AC FIELDS
   LADDERS
   DC
   SUPERLATTICES
   STATISTICS
   ELECTRONS
   LIFETIME
Аннотация: A simple method of calculating the Wannier-Stark resonances in 2D lattices is suggested. Using this method we calculate the complex Wannier-Stark spectrum for a nonseparable 2D potential realized in optical lattices and analyze its general structure. The dependence of the lifetime of Wannier-Stark states on the direction of the static field (relative to the crystallographic axis of the lattice) is briefly discussed.

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Держатели документа:
Univ Kaiserslautern, Fachbereich Phys, D-67653 Kaiserslautern, Germany
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Gluck, M.; Keck, F.; Kolovsky, A. R.; Коловский, Андрей Радиевич; Korsch, H. J.
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Val'kov, V. V.
Nonequilibrium Green’s functions in the atomic representation and the problem of quantum transport of electrons through systems with internal degrees of freedom / V. V. Val’kov, S. V. Aksenov // Theor. Math. Phys. - 2018. - Vol. 194, Is. 2. - P. 236-251, DOI 10.1134/S0040577918020046. - Cited References: 14. - This research was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund (Grant Nos. 16-02-00073, 16-42-243056, 16-42-242036, and 17-42-240441) and in part (S. V. A.) by the Program for Governmental Support for Young Scientists and Candidates of Science (Grant No. MK-1398.2017.2). . - ISSN 0040-5779
Кл.слова (ненормированные):
nonequilibrium Green’s functions -- Keldysh contour -- atomic representation -- kinetic equation -- inelastic scattering
Аннотация: We develop the theory of quantum transport of electrons through systems with strong correlations between fermionic and internal spin degrees of freedom. The atomic representation for the Hamiltonian of a device and nonequilibrium Green’s functions constructed using the Hubbard operators allow overcoming difficulties in the perturbation theory encountered in the traditional approach because of a larger number of bare scattering amplitudes. Representing the matrix elements of effective interactions as a superposition of terms each of which is split in matrix indices, we obtain a simple method for solving systems of very many equations for nonequilibrium Green’s functions in the atomic representation. As a result, we obtain an expression describing the electron currents in a device one of whose sites is in tunnel coupling with the left contact and the other, with the right contact. We derive closed kinetic equations for the occupation numbers under conditions where the electron flow leads to significant renormalization of them.

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Публикация на русском языке Вальков, Валерий Владимирович. Неравновесные функции Грина в атомном представлении и проблема квантового транспорта электронов через системы с внутренними степенями свободы [Текст] / В. В. Вальков, С. В. Аксенов // Теор. и мат. физика. - 2018. - Т. 194 № 2. - С. 277-294

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Вальков, Валерий Владимирович
}
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Val'kov, V. V.
Inelastic tunnel transport of electrons through an anisotropic magnetic structure in an external magnetic field / V. V. Val'kov, S. V. Aksenov, E. A. Ulanov // J. Exp. Theor. Phys. - 2014. - Vol. 119, Is. 1. - P. 124-137, DOI 10.1134/S1063776114060065. - Cited References: 35. - This work was performed under the Program "Quantum Mesoscopic and Disordered Systems" of the Presidium of the Russian Academy of Sciences and supported financially by the Russian Foundation for Basic Research (project nos. 13-02-00523, 13-02-98013, and 14-02-31280). The work of one of coauthors (S. V. A.) was supported by grant no. MK-526-526.2013.2 of the President of the Russian Federation and scholarship SP-6361.2013.5 of the President of the Russian Federation. . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
SINGLE-MOLECULE
   SPECTROSCOPY
   ATOM
   STATE
Аннотация: Quantum transport of electrons through a magnetic impurity located in an external magnetic field and affected by a substrate is considered using the Keldysh diagram technique for the Fermi and Hubbard operators. It is shown that in a strongly nonequilibrium state induced by multiple reflections of electrons from the impurity, the current-voltage (I-V) characteristic of the system contains segments with a negative conductivity. This effect can be controlled by varying the anisotropy parameter of the impurity center as well as the parameters of coupling between the magnetic impurity and metal contacts. The application of the magnetic field is accompanied by an increase in the number of Coulomb steps in the I-V curve of the impurity. The effect of appreciable magnetoresistance appears in this case. We demonstrate the possibility of switching between magnetic impurity states with different total spin projection values in the regime of asymmetric coupling of this impurity with the contacts.

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Переводная версия Вальков, Валерий Владимирович. Неупругий туннельный транспорт электронов через анизотропную магнитную структуру во внешнем магнитном поле [Текст] / В. В. Вальков, С. В. Аксенов, Е. А. Уланов // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 146 Вып. 1. - С. 144-159

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Уланов Е. А.; Вальков, Валерий Владимирович; Russian Foundation for Basic Research [13-02-00523, 13-02-98013, 14-02-31280]; Russian Federation [MK-526-526.2013.2, SP-6361.2013.5]
}
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Val'kov, V. V.
Energy structure of high-temperature superconductors with the intersite Coulomb interaction / V. V. Val'kov, M. M. Korovushkin // Eur. Phys. J. B. - 2009. - Vol. 69, Is. 2. - P. 219-227, DOI 10.1140/epjb/e2009-00141-4. - Cited References: 26. - This study was supported by the program "Quantum physics of condensed matter"of the Presidium of the Russian Academy of Sciences (RAS); the Russian Foundation for Basic Research (project no. 07-02-00226); the Siberian Branch of RAS (Interdisciplinary Integration project no. 53). One of authors (M. K.) would like to acknowledge the support of the Dynasty Foundation. . - ISSN 1434-6028

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TC SUPERCONDUCTIVITY
   SINGLE-BAND
   ELECTRON CORRELATIONS
   CU OXIDES
   J MODEL
   DERIVATION
Кл.слова (ненормированные):
Strongly correlated electron systems; heavy fermions -- Narrow-band systems; intermediate-valence solids -- Cuprate superconductors -- Strongly correlated electron systems heavy fermions -- Narrow-band systems intermediate-valence solids -- Cuprate superconductors -- Emery model -- Energy structures -- Fermi state -- Integrated density -- Root mean squares -- Spectral intensity -- Copper compounds -- Corundum -- Coulomb interactions -- Electrons -- Fermions -- High temperature superconductors -- Oxide superconductors -- Superconductivity
Аннотация: The effect of the intersite Coulomb interaction of fermions on the ground state and energy structure of high-temperature superconductors is considered within the three-band Emery model using an extended basis of the irreducible operators orthogonal on Mori. The proposed theory allows prediction of bands of the fluctuation states whose spectral intensity grows with an increase in the root-mean-square fluctuations of the occupation numbers. The increase in these fluctuations in high-temperature superconductors upon doping plays a key role in redistribution of the integrated density of the Fermi states.

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Держатели документа:
[Val'kov, V. V.
Korovushkin, M. M.] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Val'kov, V. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics, Siberian Branch, RAS, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Korovushkin, M. M.; Коровушкин, Максим Михайлович; Вальков, Валерий Владимирович; Russian Academy of Sciences; Russian Foundation for Basic Research [07-02-00226]; RAS; Dynasty Foundation
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Val'kov, V. V.
Effect of Spin Fluctuations on the Superconducting Phase of Hubbard Fermions in the t-t'-t"-J* Model / V. V. Val'kov, A. A. Golovnya // J. Exp. Theor. Phys. - 2008. - Vol. 107, Is. 6. - P. 996-1008, DOI 10.1134/S1063776108120091. - Cited References: 33. - This work was supported by the Program "Quantum Macrophysics" of the Presidium of the Russian Academy of Sciences, Russian Foundation for Basic Research (project no. 06.02.16100), and Integration project no. 3.4 of the Siberian Branch of the Russian Academy of Sciences. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPECTRUM
Кл.слова (ненормированные):
Electric conductivity -- Fermions -- Integral equations -- Spin dynamics -- Spin fluctuations -- Anomalous components -- Critical temperatures -- Electron concentrations -- Hubbard -- Hubbard operators -- Joint effects -- Large systems -- Nonhomogeneous equations -- One-loop approximations -- Order parameters -- Renormalization -- Scattering process -- Self energies -- Spin-fluctuation -- Strongly correlated electrons -- Superconducting phase -- System of integral equations -- Superconductivity
Аннотация: The effect of spin-fluctuation scattering processes on the region of the superconducting phase in strongly correlated electrons (Hubbard fermions) is investigated by the diagram technique for Hubbard operators. Modified Gor'kov equations in the form of an infinitely large system of integral equations are derived taking into account contributions of anomalous components P(0 sigma),((sigma) over bar0) of strength operator P. It is shown that spin-fluctuation scattering processes in the one-loop approximation for the t-t'-t"-J* model taking into account long-range hoppings and three-center interactions are reflected by normal (P(0 sigma), (0 sigma)) and anomalous (P(0 sigma), ((sigma) over bar0)) components of the strength operator. Three-center interactions result in different renormalizations of the kernels of the integral equations for the superconducting d phase in the expressions for the self-energy and strength operators. In this approximation for the d-type symmetry of the order parameter for the superconducting phase, the system of integral equations is reduced to a system of nonhomogeneous equations for amplitudes. The resultant dependences of critical temperature on the electron concentrations show that joint effect of long-range hoppings, three-center interactions, and spin-fluctuation processes leads to strong renormalization of the superconducting phase region.

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Держатели документа:
[Val'kov, V. V.
Golovnya, A. A.] Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Val'kov, V. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Val'kov, V. V.
Golovnya, A. A.] Siberian State Aerosp Univ, Krasnoyarsk 660074, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Siberian State Aerospace University, Krasnoyarsk 660074, Russian Federation

Доп.точки доступа:
Golovnya, A. A.; Головня, Александр Александрович; Вальков, Валерий Владимирович
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    Val'kov, V. V.
    Effect of multiple scattering on the quantum transport of electrons through a magnetic impurity with a single-ion anisotropy : abstract / V. V. Val'kov, S. V. Aksenov, E. A. Ulanov // Spin Waves 2013, Int. Symp. : Program. Abstracts. - СПб., 2013. - P. 75 . - ISBN 978-5-91918-334-1
   Перевод заглавия: Влияние многократного рассеяния на квантовый транспорт электронов через магнитную примесь с одноионной анизотропией

Материалы конференции

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Вальков, Валерий Владимирович; Российская академия наук; Физико-технический институт им. А.Ф. Иоффе РАН; "Spin Waves", International Symposium (2013 ; июнь ; 9-15 ; Санкт-Петербург)
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10.

    Val'kov, V. V.
    Effect of multiple scattering on the quantum transport of electrons through a magnetic impurity with a single-ion anisotropy : abstract / V. V. Val'kov, S. V. Aksenov, E. A. Ulanov ; Taurida National V. I. Vernadsky University // Functional materials : Abstracts / ed. V. N. Berzhansky. - Simferopol, 2013. - Ст. BP2-1P/2. - P. . - ISBN 978-966-491-465-6
   Перевод заглавия: Влияние многократного рассеяния на квантовый транспорт электронов через магнитную примесь с одноионной анизотропией

Материалы конференции

Доп.точки доступа:
Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Вальков, Валерий Владимирович; Taurida National V. I. Vernadsky University; "Functional Materials", International Conference(2013 ; 29 Sept.-5 Oct. ; Partenit, Yalta; Ukraine Crimea)
}
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11.

Study of electroconductivity in cobalt nanocrystalline films / G. I. Frolov [и др.] // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 4. - P. 1208-1213. - Cited References: 13 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
METAL-FILMS
   RESISTIVITY
   CONDUCTION
   ELECTRONS
   DENSITY

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Доп.точки доступа:
Frolov, G. I.; Zhigalov, V. S.; Polskii, A. I.; Pozdnyakov, V. G.
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12.

Spin fluctuation renormalizations of normal and superconducting state properties in t-J*-model / V. V. Val'kov, A. A. Golovnya // J. Phys. Conf. Ser. - 2010. - Vol. 200, Is. SECTION 1, DOI 10.1088/1742-6596/200/1/012050 . - ISSN 1742-6588
Кл.слова (ненормированные):
Critical temperatures -- Electron concentration -- Hubbard -- Hubbard operators -- Joint effect -- Normal phase -- One-loop approximation -- Order parameter -- Renormalization -- Scattering process -- Strongly correlated electrons -- Superconducting phase -- Superconducting state -- Distribution functions -- Mathematical operators -- Superconductivity -- Spin fluctuations
Аннотация: The effect of spin-fluctuation scattering processes on the region of the superconducting phase in the strongly correlated electrons (Hubbard fermions) has been investigated by the diagram technique for Hubbard operators. It is shown that spin fluctuations in the one-loop approximation for the t - t? - t? - J*- model taking into account long-range hoppings and three-center interactions are reflected by components of the strength operator. In this approximation for the d-type symmetry of the order parameter for the superconducting phase a system of infinite integral equations has been derived. Obtained dependencies of critical temperature on the electron concentrations show that joint effect of long-range hoppings, three-center interactions, and dynamical spin-fluctuation processes leads to strong renormalization of the superconducting phase region. It was shown that these processes essentially modify distribution functions of Hubbard fermions in normal phase. © 2010 IOP Publishing Ltd.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Val'kov, V.V.; Golovnya, A.A.
}
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13.

    Simulating cyclotron-Bloch dynamics of a charged particle in a 2D lattice by means of cold atoms in driven quasi-1D optical lattices / A. R. Kolovsky // Front. Phys. - 2012. - Vol. 7, Is. 1. - P. 3-7, DOI 10.1007/s11467-011-0202-3. - Cited Reference Count: 11. - Гранты: This work was partially supported by Russian Foundation for Basic Research, grant RFBR-10-02-00171-a. - Финансирующая организация: Russian Foundation for Basic Research [RFBR-10-02-00171-a] . - ISSN 2095-0462
Рубрики:
MAGNETIC-FIELDS
   ELECTRONS
Кл.слова (ненормированные):
optical lattice -- bloch dynamics -- cyclotron oscillations -- cold atoms -- bloch dynamics -- cold atoms -- cyclotron oscillations -- optical lattice
Аннотация: Quantum dynamics of a charged particle in a two-dimensional (2D) lattice subject to magnetic and electric fields is a rather complicated interplay between cyclotron oscillations (the case of vanishing electric field) and Bloch oscillations (zero magnetic field), details of which has not yet been completely understood. In the present work we suggest to study this problem by using cold atoms in optical lattices. We introduce a one-dimensional (1D) model which can be easily realized in laboratory experiments with quasi-1D optical lattices and show that this model captures many features of the cyclotron-Bloch dynamics of the quantum particle in 2D square lattices.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич
}
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14.

Shneyder, E. I.
Isotope effect in the model of strongly correlated electrons with the magnetic and phonon superconducting pairing mechanisms / E. I. Shneyder, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 6. - P. 1017-1021, DOI 10.1134/S1063776109120139. - Cited References: 42. - This study was financed under programs 5.7 and "Quantum Physics of Condensed Matter" of the Presidium of the Russian Academy of Sciences, integration project no. 40 of the Siberian Branch and Ural Division of the Russian Academy of Sciences, and the Russian Foundation for Basic Research (project no. 09-02-00127). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
CUPRATE SUPERCONDUCTORS
   PHASE-TRANSITIONS
   3-CENTER INTERACTIONS
   HUBBARD-MODEL
   TEMPERATURE
   LA2-XSRXCUO4
   SYMMETRY
   EXCHANGE
   COPPER
   BI2SR2CACU2O8+DELTA
Кл.слова (ненормированные):
Ab initio calculations -- Calculated values -- Cooper pairing -- Isotope effect -- Magnetic mechanisms -- Order of magnitude -- Pairing mechanism -- Phonon mechanism -- Strongly correlated electrons -- Superconducting pairing mechanism -- Superconducting state -- Type theory -- Carrier mobility -- Electron-phonon interactions -- Isotopes -- Superconductivity -- Superconducting magnets
Аннотация: Peculiarities of the temperature isotope effect in a BCS-type theory describing the exchange and phonon mechanisms of Cooper pairing in a system of strongly correlated electrons are considered. The electron-phonon interaction constant is determined from the fitting of the calculated value of the isotope-effect index to the observed value with the parameters of La(2 - x) Sr (x) CuO(4) obtained from ab initio calculations. The value of this constant indicates that the contribution from the traditional pairing mechanism to the superconducting state is of the same order of magnitude as the contribution from the magnetic mechanism.

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Публикация на русском языке Шнейдер, Елена Игоревна. Изотопический эффект в модели сильно коррелированных электронов, учитывающей магнитный и фононный механизмы сверхпроводящего спаривания [Текст] / Е. И. Шнейдер, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 2009. - Т. 136 Вып. 6. - С. 1177-1182

Держатели документа:
[Shneyder, E. I.
Ovchinnikov, S. G.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shneyder, E. I.] Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Шнейдер, Елена Игоревна; Presidium of the Russian Academy of Sciences [40]; Russian Academy of Sciences; Russian Foundation for Basic Research [09-02-00127]
}
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15.

Shear driven waves in the induced magnetosphere of Mars / H. . Gunell [et al.] // Plasma Phys. Control. Fusion. - 2008. - Vol. 50, Is. 7. - Ст. 74018, DOI 10.1088/0741-3335/50/7/074018. - Cited References: 27 . - ISSN 0741-3335

РУБ Physics, Fluids & Plasmas + Physics, Nuclear
Рубрики:
SOLAR-WIND INTERACTION
   KELVIN-HELMHOLTZ INSTABILITY
   MARTIAN ATMOSPHERE
   VELOCITY SHEAR
   VENUS
   PLASMA
   MHD
   IONOPAUSE
   SIMULATIONS
   BOUNDARY
Кл.слова (ненормированные):
Charged particles -- Magnetosphere -- Motion estimation -- Natural frequencies -- Plasma stability -- Shearing machines -- p ,p ,t measurements -- Computational results -- Electron densities -- Fundamental frequency (FF) -- Higher harmonics -- ion densities -- Ion velocities -- velocity shear -- Electrons
Аннотация: We present measurements of oscillations in the electron density, ion density and ion velocity in the induced magnetosphere of Mars. The fundamental frequency of the oscillations is a few millihertz, but higher harmonics are present in the spectrum. The oscillations are observed in a region where there is a velocity shear in the plasma flow. The fundamental frequency is in agreement with computational results from an ideal-MHD model. An interpretation based on velocity-shear instabilities is described.

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Держатели документа:
[Gunell, H.
Koepke, M.] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA
[Amerstorfer, U. V.
Biernat, H. K.] Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria
[Amerstorfer, U. V.
Biernat, H. K.] Graz Univ, Inst Phys, A-8010 Graz, Austria
[Nilsson, H.
Holmstrom, M.
Lundin, R.
Barabash, S.] Swedish Inst Space Phys, SE-98128 Kiruna, Sweden
[Grima, C.] Lab Planetol Grenoble, F-38041 Grenoble 9, France
[Fraenz, M.] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany
[Winningham, J. D.
Frahm, R. A.] SW Res Inst, San Antonio, TX USA
[Sauvaud, J-A
Fedorov, A.] Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, France
[Erkaev, N. V.] Russian Acad Sci, Inst Computat Modelling, Krasnoyarsk 660036 36, Russia
ИВМ СО РАН
Department of Physics, West Virginia University, Morgantown, WV 26506-6315, United States
Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, A-8042 Graz, Austria
Institute of Physics, University of Graz, Universitatsplatz 5, A-8010 Graz, Austria
Swedish Institute of Space Physics, P.O. Box812, SE-981 28 Kiruna, Sweden
Laboratoire de Planetologie de Grenoble, BP-53, F-38041 Grenoble Cedex 9, France
Max-Planck-Institut fur Sonnensystemforschung, Max-Planck-Stra?e 2, 37191 Katlenburg-Lindau, Germany
Southwest Research Institute, San Antonio, TX 7228-0510, United States
Centre d'Etude Spatiale des Rayonnements, BP-4346, F-31028 Toulouse, France
Institute of Computational Modelling, Russian Academy of Sciences, 660036 Krasnoyarsk-36, Russian Federation

Доп.точки доступа:
Gunell, H.; Amerstorfer, U. V.; Nilsson, H.; Grima, C.; Koepke, M.; Franz, M.; Winningham, J. D.; Frahm, R. A.; Sauvaud, J. A.; Fedorov, A.; Erkaev, N. V.; Еркаев, Николай Васильевич; Biernat, H. K.; Holmstrom, M.; Lundin, R.; Barabash, S.
}
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16.

SANDALOV, I. S.
THE AMPLIFICATION OF THE KONDO EFFECT IN NORMAL METALS BY A MAGNETIC-FIELD / I. S. SANDALOV, A. N. PODMARKOV // JOURNAL OF PHYSICS F-METAL PHYSICS. - 1986. - Vol. 16, Is. 12. - P. 2153-2166, DOI 10.1088/0305-4608/16/12/023. - Cited References: 17 . - ISSN 0305-4608

РУБ Physics, Applied + Physics, Multidisciplinary

Кл.слова (ненормированные):
ELECTRONS - Scattering -- CONDUCTION ELECTRON -- KONDO EFFECT -- METALS AND ALLOYS

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Держатели документа:
LV Kirensky Inst. of Phys., Acad. of Sci., Krasnoyarsk, Russian Federation

Доп.точки доступа:
PODMARKOV, A. N.; Сандалов, Игорь Семёнович
}
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17.

Sandalov, I. S.
Local gauge invariance versus slave boson-like representations in systems with strongly correlated electrons / I. S. Sandalov, M. . Richter // Phys. Scr. - 1996. - Vol. 54, Is. 4. - P. 410-416, DOI 10.1088/0031-8949/54/4/020. - Cited References: 38 . - ISSN 0281-1847

РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   VALENCE-BOND STATE
   DIAGRAM TECHNIQUE
   ANDERSON MODEL
   HUBBARD MODEL
   SUPERCONDUCTIVITY
   LIMIT
   PHASE
Аннотация: The flux phase solutions in the t-J model the gauge theories with Chern-Simons term, promising new exciting physics, are so far obtained only within slave-boson (or fermion) approaches, where local gauge invariance is not taken into account exactly. We inspect the possibility to do this, mainly, in the example of the t-J model The analysis of different parametrizations in the functional representation shows that (i) calculations which take into account constraints for the number of on-site-available states are describing quasiparticles in terms of the wrong local statistics, and contain gauge non-invariant objects; (ii) application of the projection technique in the slave-boson(fermion) representation reproduces the correct statistics, and is exactly equivalent to the conventional diagram technique for Hubbard operators. In the language of slave bosons this means that the Fourier transformation leading to Bloch states should be made only after accounting constraints in the measure of functional integral.

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Держатели документа:
UNIV UPPSALA,DEPT PHYS,CONDENSED MATTER THEORY GRP,S-75121 UPPSALA,SWEDEN
RUSSIAN ACAD SCI,LV KIRENSKY PHYS INST,KRASNOYARSK 660036,RUSSIA
DRESDEN UNIV TECHNOL,DEPT PHYS,MPG RES GRP ELECTRON SYST,D-01062 DRESDEN,GERMANY
ИФ СО РАН

Доп.точки доступа:
Richter, M.; Сандалов, Игорь Семёнович
}
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18.

SANDALOV, I. S.
FLUX PHASE, NEEL ANTIFERROMAGNETISM, AND SUPERCONDUCTIVITY IN THE T-J MODEL / I. S. SANDALOV, M. . RICHTER // Phys. Rev. B. - 1994. - Vol. 50, Is. 17. - P. 12855-12865, DOI 10.1103/PhysRevB.50.12855. - Cited References: 27 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
HUBBARD-MODEL
INSTABILITY
ELECTRONS

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Держатели документа:
RAS,KIRENSKY INST PHYS,KRASNOYARSK 660036,RUSSIA
ИФ СО РАН
Department of Physics, Uppsala University, Box 530, S-75121 Uppsala, Sweden
Kirensky Institute of Physics of RAS, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
RICHTER, M.; Сандалов, Игорь Семёнович
}
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19.

SANDALOV, I. S.
EFFECT OF MIXING THE STATES OF CONDUCTIVITY ELECTRONS AND IMPURITY D(F) IONS ON ELECTRIC-CONDUCTIVITY / I. S. SANDALOV, M. S. YERUKHIMOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1982. - Vol. 82, Is. 1. - P. 246-253. - Cited References: 17 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary

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Доп.точки доступа:
YERUKHIMOV, M. S.
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20.

Sadreev, A. F.
Current statistics for wave transmission through an open Sinai billiard: Effects of net currents / A. F. Sadreev, K. F. Berggren // Phys. Rev. E. - 2004. - Vol. 70, Is. 2. - Ст. 26201, DOI 10.1103/PhysRevE.70.026201. - Cited References: 27 . - ISSN 1539-3755

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
EIGENVECTOR STATISTICS
   OPEN SYSTEMS
   EIGENFUNCTIONS
   CHAOS
   FLUCTUATIONS
   CROSSOVER
   ELECTRONS
   INTENSITY
Кл.слова (ненормированные):
Acoustic wave transmission -- Boundary conditions -- Computer simulation -- Continuum mechanics -- Current density -- Fermi level -- Mathematical transformations -- Microwaves -- Probability density function -- Quantum theory -- Random processes -- Reverberation -- Statistical methods -- Surface waves -- Waveguides -- Microwave cavities -- Poynting vector -- Sinai billiard -- Wave functions -- Cavity resonators
Аннотация: Transport through quantum and microwave cavities is studied by analytic and numerical techniques. In particular, we consider the statistics for a finite net probability current (Poynting vector) flowing through an open ballistic Sinai billiard to which two opposite leads/wave guides are attached. We show that if the net probability current is small, the scattering wave function inside the billiard is well approximated by a Gaussian random complex field. In this case, the current statistics are universal and obey simple analytic forms. For larger net currents, these forms still apply over several orders of magnitudes. However, small characteristic deviations appear in the tail regions. Although the focus is on electron and microwave billiards, the analysis is relevant also to other classical wave cavities as, for example, open planar acoustic reverberation rooms, elastic membranes, and water surface waves in irregularly shaped vessels.

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Держатели документа:
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Astafev Krasnoyarsk Pedag Univ, Krasnoyarsk 660049, Russia
ИФ СО РАН
Department of Physics, Linkoping University, S-581 83 Linkoping, Sweden
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation
Astaf'ev Krasnoyarsk Pedagogical U., 660049 Lebedeva, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Berggren, K. F.; Садреев, Алмаз Фаттахович
}
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