Библиотека института физики им. Л.В. Киренского СО РАН

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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tarasov A. S., Rautskii M. V., Bondarev I. A., Lukyanenko A. V., Tarasov I. A., Yakovlev I. A., Ovchinnikov S. G., Volkov N. V.
Заглавие : Spin accumulation effect in fabricated planar device based on epitaxial Fe3Si/p-Si structure
Коллективы : Federal Research Center KSC SB RAS, Kirensky Institute of Physics, Research Institute of Agriculture and Ecology of the Arctic, Siberian Federal Univercity
Место публикации : International school/workshop on actual problems of condensed matter physics: Program. Book of abstracts/ ed. S. G. Ovchinnikov. - Norilsk, 2018. - P.24. - ISBN 978-5-904603-08-3
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Korshunov M. M.
Заглавие : Itinerant spin fluctuations in iron-based superconductors
Место публикации : Perturbation theory: advances in research and applications. - New York: Nova Science Publishers, 2018. - Chap. 2. - P.61-137. - ISBN 9781536129908. - ISBN 9781536129892
Ключевые слова (''Своб.индексиров.''): fe-based superconductors--spin fluctuations--spin resonance peak--unconventional superconductivity
Аннотация: In multiband systems, it is possible to explore a variety of competing ground states. Bright examples are the Fe-based pnictides and chalcogenides, which demonstrate metallic, superconducting, and various magnetic phases. Here I discuss only one of the many interesting topics, namely, spin fluctuations in metallic multiband systems. I show how to calculate the effect of itinerant spin excitations on the electronic properties and formulate a theory of spin fluctuation-induced superconductivity. The superconducting state is unconventional and thus the system demonstrates unusual spin response with the spin resonance feature. I discuss its origin, consequences, and relation to experimental observations. Role of the spin-orbit coupling is specifically emphasized.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Mitskan V. A., Dzebisashvili D. M., Barabanov A. F.
Заглавие : Hierarchy of low-energy models of the electronic structure of cuprate HTSCs: The role of long-range spin-correlated hops
Коллективы : Russian fund for fundamental science, Government of the Krasnoyarsk region, Krasnoyarsk regional fund for scientific and technical activity [16-42-240435]; complex program SO RAN [P.2.P, 0356-2015-0405]; RFFI [16-02-00304]
Место публикации : Low Temp. Phys. - 2018. - Vol. 44, Is. 2. - P.130-138. - ISSN 1063-777X, DOI 10.1063/1.5020908. - ISSN 1090-6517(eISSN)
Примечания : Cited References: 42. - This study was conducted with financial support from the Russian fund for fundamental science, Government of the Krasnoyarsk region, Krasnoyarsk regional fund for scientific and technical activity in the framework of Project No. 16-42-240435 as well as the complex program SO RAN No. P.2.P (Project No. 0356-2015-0405). The work of A. F. Barabanov is supported by RFFI (Grant No. 16-02-00304).
Предметные рубрики: HIGH-TC SUPERCONDUCTORS
SINGLE-BAND MODELS
OXIDE SUPERCONDUCTORS
Аннотация: It is shown that for the three-band Emery p–d-model that reflects the real structure of the CuO2-plane of high-temperature superconductors in the regime of strong electron correlations, it is possible to carry out a sequence of reductions to the effective models reproducing low-energy features of elementary excitation spectrum and revealing the spin-polaron nature of the Fermi quasiparticles. The first reduction leads to the spin-fermion model in which the subsystem of spin moments, coupled by the exchange interaction and localized on copper ions, strongly interacts with oxygen holes. The second reduction deals with the transformation from the spin-fermion model to the φ–d-exchange model. An important feature of this transformation is the large energy of the φ–d-exchange coupling, which leads to the formation of spin polarons. The use of this fact allows us to carry out the third reduction, resulting in the t̃ −J̃∗−I-model. Its distinctive feature is the importance of spin-correlated hops as compared to the role of such processes in the commonly used t–J*-model derived from the Hubbard model. Based on the comparative analysis of the spectrum of Fermi excitations calculated for the obtained effective models of the CuO2-plane of high-temperature superconductors, the important role of the usually ignored long-range spin-correlated hops is determined.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Aksenov S. V.
Заглавие : Spin-polarized-current switching mediated by Majorana bound states
Место публикации : J. Magn. Magn. Mater. - 2018. - Vol. 465. - P.88-92. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2018.04.043
Примечания : Cited References: 31. - We acknowledge fruitful discussions with A.D. Fedoseev and M.S. Shustin. The work was supported by the Comprehensive Programme SB RAS No. 0356-2015-0403 , Russian Foundation for Basic Research , Government of Krasnoyarsk Territory , Krasnoyarsk Region Science and Technology Support Fund to the research projects Nos. 16-02-00073 , 17-42-240441 . The work of S.V.A. was supported by grant of the President of the Russian Federation (MK-1398.2017.2).
Ключевые слова (''Своб.индексиров.''): majorana bound states--topological superconductivity--current-switch effect
Аннотация: We present the study of transport properties of a superconducting wire with strong Rashba spin-orbit coupling for different orientations of an external magnetic field. Using the nonequilibrium Green's functions in the tight-binding approach the crucial impact of the relative alignment of lead magnetization and the Majorana bound state (MBS) spin polarization on the low-bias conductance and shot noise is presented. Depending on this factor the transport regime can effectively vary from symmetric to extremely asymmetric. In the last situation the suppression of MBS-assisted conductance results in current-switch effect allowing the electrical detection of the Majorana fermions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Dzebisashvili D. M., Korovushkin M. M., Barabanov A. F.
Заглавие : Stability of the superconducting d-wave pairing toward the intersite Coulomb repulsion in CuO2 plane
Место публикации : J. Low Temp. Phys. - 2018. - Vol. 191, Is. 5-6. - P.408-425. - ISSN 00222291 (ISSN), DOI 10.1007/s10909-018-1882-7
Примечания : Cited References: 70. - Acknowledgements The work was supported by the program of the Presidium of the Russian Academy of Sciences No. 12 “Fundamental problems of high-temperature superconductivity”, the Russian Foundation for Basic Research (RFBR) and partly by the Government of Krasnoyarsk Region and the Krasnoyarsk Region Science and Technology Support Fund (Projects Nos. 16-42-243057 and 16-42-240435). The work of A. F. B. was funded by RFBR (Project No. 16-02-00304). The work of M. M. K. was supported by a grant of the President of the Russian Federation (Project MK-1398.2017.2).
Ключевые слова (''Своб.индексиров.''): cuprate superconductors--unconventional superconductivity--spin-charge coupling--spin polarons--intersite coulomb interaction
Аннотация: Taking into account the real crystalline structure of the CuO2 plane and the strong spin-fermion coupling, we study the influence of the intersite Coulomb repulsion between holes on the Cooper instability of the spin-polaron quasiparticles in cuprate superconductors. The analysis shows that only the superconducting d-wave pairing is implemented in the whole region of doping, whereas the solutions of the self-consistent equations for the s-wave pairing are absent. It is shown that intersite Coulomb interaction V1 between the holes located at the nearest oxygen ions does not affect the d-wave pairing, because its Fourier transform Vq vanishes in the kernel of the corresponding integral equation. The intersite Coulomb interaction V2 of quasiparticles located at the next-nearest oxygen ions does not vanish in the integral equations, however, but it is also shown that the d-wave pairing is robust toward this interaction for physically reasonable values of V2.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubrovskiy A. A., Rautskii M. V., Moshkina E. M., Yatsyk I. V., Eremina R. M.
Заглавие : EPR-determined anisotropy of the g-factor and magnetostriction of a Cu2MnBO5 single crystal with a ludwigite structure
Коллективы : Russian Foundation for Basic Research; Government of the Krasnoyarsk Territory [16-42-243028]
Место публикации : JETP Letters. - 2017. - Vol. 106, Is. 11. - P.716-719. - ISSN 0021-3640, DOI 10.1134/S0021364017230072. - ISSN 1090-6487(eISSN)
Примечания : Cited References:18. - This study was supported jointly by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory (project no. 16-42-243028).
Предметные рубрики: ELECTRON-SPIN-RESONANCE
Аннотация: Electron paramagnetic resonance (EPR) and magnetostriction of the Cu2MnBO5 single crystal have been studied. The EPR spectrum consists of a single Lorentzian line due to the exchange-coupled system of spins of Cu2+ and Mn3+ ions. It has been established experimentally that the g-factor in the paramagnetic region is strongly anisotropic and anomalously small, which is not typical of the exchange-coupled system of spins of Cu2+ and Mn3+ ions. At a temperature of 150 K, the g-factors along the crystallographic a, b, and c axes are 2.04, 1.96, and 1.87, respectively. Such small effective g-factor values can be due to the effect of the anisotropic Dzyaloshinskii-Moriya exchange interaction between the spins of Cu2+ and Mn3+ ions directed along the a axis. The presence of two Cu2+ and Mn3+ Jahn-Teller ions occupying four nonequivalent positions in the crystal is responsible for the absence of the inversion center. It is found that the behavior of the magnetostriction of Cu2MnBO5 is not typical of transition-metal crystals but is closer to the behavior of crystals containing rare-earth ions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Dzebisashvili D. M.
Заглавие : Dynamicalmagnetic susceptibility in the spin-fermion model for cuprate superconductors
Коллективы : Russian Foundation for Basic Research [16-02-00073]; Krasnoyarsk Kray Foundation for Scientific and Technical Progress [16-42-240435]; Siberian Branch of the Russian Academy of Sciences [II.2P, 0356-2015-0405]; Administration of Krasnoyarsk Kray
Место публикации : Theor. Math. Phys. - 2017. - Vol. 193, Is. 3. - P.1853-1864. - ISSN 0040-5779, DOI 10.1134/S004057791712011X. - ISSN 1573-9333(eISSN)
Примечания : Cited References:35. - This research was supported by the Russian Foundation for Basic Research (Grant No. 16-02-00073), the Administration of Krasnoyarsk Kray and the Krasnoyarsk Kray Foundation for Scientific and Technical Progress (Grant No. 16-42-240435), and the complex program No. II.2P of the Siberian Branch of the Russian Academy of Sciences (Grant No. 0356-2015-0405).
Предметные рубрики: T-J MODEL
LONG-RANGE-ORDER
POLARON
CUO2
EXCITATIONS
LATTICE
WAVE
Ключевые слова (''Своб.индексиров.''): high-temperature conductor--spin-fermion model--magnetic susceptibility--spin polaron
Аннотация: Using the method of diagram techniques for the spin and Fermi operators in the framework of the SU(2)-invariant spin-fermion model of the electron structure of the CuO2plane of copper oxides, we obtain an exact representation of the Matsubara Green’s function D⊥(k, iω m ) of the subsystem of localized spins. This representation includes the Larkin mass operator ΣL(k, iω m ) and the strength and polarization operators P(k, iω m ) and Π(k, iω m ). The calculation in the one-loop approximation of the mass and strength operators for the Heisenberg spin system in the quantum spin-liquid state allows writing the Green’s function D⊥(k, iω m ) explicitly and establishing a relation to the result of Shimahara and Takada. An essential point in the developed approach is taking the spin-polaron nature of the Fermi quasiparticles in the spin-fermion model into account in finding the contribution of oxygen holes to the spin response in terms of the polarization operator Π(k, iω m ).
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Вальков, Валерий Владимирович, Федосеев, Александр Дмитриевич
Заглавие : Квантовый транспорт через одномерную цепочку, согнутую в форме квадрата, при учете спин-орбитального взаимодействия Рашбы
Коллективы : Южный федеральный университет, "Порядок, беспорядок и свойства оксидов", международный междисциплинарный симпозиум, "Order, Disorder and Properties of Oxides", International meeting
Место публикации : 20-й Междунар. симп. "Порядок, беспорядок и свойства оксидов" (ODPO-20): труды симпозиума. - 2017. - Вып. 20, Т. 1. - С. 30-34
Примечания : Библиогр.: 5 назв.
Аннотация: В приближении сильной связи при использовании формализма Ландауэра-Бюттикера исследованы транспортные свойства одномерной цепочки, согнутой в форме квадрата при учете спин-орбитального взаимодействия Рашбы. Обнаружено, что такая геометрия устройства, приводит к возникновению антирезонансов Фано. Показано, что при критической величине спин-орбитального взаимодействия, когда характеристическая длина, связанная с величиной спин-орбитального взаимодействия, совпадает с длиной стороны квадрата, возникает полное отражение от устройства. При величине параметра спин-орбитального взаимодействия близкого к критическому значению прохождение электрона возможно только при энергиях, находящихся в пределах узких интервалов.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzmenko A. M., Szaller D., Kain T., Dziom V., Weymann L., Shuvaev A., Pimenov A., Mukhin A. A., Ivanov V. Y., Gudim I. A., Bezmaternykh L. N., Pimenov A.
Заглавие : Switching of magnons by electric and magnetic fields in multiferroic borates
Место публикации : Phys. Rev. Lett. - 2018. - Vol. 120, Is. 2. - Ст.027203. - ISSN 00319007 (ISSN), DOI 10.1103/PhysRevLett.120.027203
Примечания : Cited References: 72
Ключевые слова (''Своб.индексиров.''): electric and magnetic fields--electric manipulation--excitation conditions--high frequency hf--materials research--multiferroic materials--spin orientations--terahertz radiation
Аннотация: Electric manipulation of magnetic properties is a key problem of materials research. To fulfill the requirements of modern electronics, these processes must be shifted to high frequencies. In multiferroic materials, this may be achieved by electric and magnetic control of their fundamental excitations. Here we identify magnetic vibrations in multiferroic iron borates that are simultaneously sensitive to external electric and magnetic fields. Nearly 100% modulation of the terahertz radiation in an external field is demonstrated for SmFe3(BO3)4. High sensitivity can be explained by a modification of the spin orientation that controls the excitation conditions in multiferroic borates. These experiments demonstrate the possibility to alter terahertz magnetic properties of materials independently by external electric and magnetic fields.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vazhenina I. G., Iskhakov R. S., Chekanova L. A.
Заглавие : Spin-wave resonance in chemically deposited Fe-Ni films: measuring the spin-wave stiffness and surface anisotropy constant
Коллективы : Russian Foundation for Basic Research [16-03-00256, 16-03-00969]
Место публикации : Phys. Solid State. - 2018. - Vol. 60, Is. 2. - P.292-298. - ISSN 1063-7834, DOI 10.1134/S1063783418020294. - ISSN 1090-6460(eISSN)
Примечания : Cited References:39. - This study was supported by the Russian Foundation for Basic Research, projects nos. 16-03-00256 and 16-03-00969.
Предметные рубрики: FERROMAGNETIC-RESONANCE
FERRIHYDRITE NANOPARTICLES
LAYERS
Аннотация: Single-layer Fe x Ni1 - x thin magnetic films have been investigated by the spin-wave resonance technique in the entire concentration range. The surface anisotropy and exchange stiffness constants for the films with a Ni content from 30 to 80 at % have been measured from the experimental standing spin wave spectra. The surface exchange spin wave penetration depth δ C = 20–30 nm has been determined from the dependences of the surface anisotropy and exchange coupling constants on the Fe20Ni80 film thickness in the range of 250–400 nm.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kirenskii L. V., Pynko V. G., Obrastsova L. M.
Заглавие : Domain structure of double layer single crystal films of iron
Место публикации : Czech. J. Phys. - 1971. - Vol. B21, no. 4-5. - P.513-515. - ISSN 0011-4626
Предметные рубрики: SPIN-PEIERLS TRANSITION
COMPOUND CUGEO3
SYSTEM CUGEO3
STATE
Аннотация: The magnetostriction of CuGcO(3) single crystals has been measured in the temperature range from 5 to 16 K in magnetic fields up to 12 T. Giant values of the magnetostrictive strains along the b-axis is observed near the phase transition from the dimerized phase to the high field magnetic phase. The field induced magnetostriction in the antiferromagnetic phase is considerably smaller than in the dimerized phase.
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Patrin G. S.
Заглавие : Magnetic resonance in [(CoP)soft/NiP/(CoP)hard/NiP]n multilayer film structures
Коллективы : Российская академия наук, Физико-технический институт им. А.Ф. Иоффе РАН, "Spin Waves", International Symposium
Место публикации : International Symposium "Spin Waves 2018": Program. - 2018. - Sec. 2: Spintronics. - 2-8
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aksenov S. V.
Заглавие : Spin-dependent nonequilibrium transport in a quadruple quantum-dot device
Коллективы : Российская академия наук, Физико-технический институт им. А.Ф. Иоффе РАН, "Spin Waves", International Symposium
Место публикации : International Symposium "Spin Waves 2018": Program. - 2018. - Sec. 2: Spintronics. - 2-1
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Abramova G. M., Gerasimova J. V., Kolesov B., Zhandun V. S., Molokeev M. S., Zharkov S. M., Vtyurin A. N.
Заглавие : The magnon mode in Raman spectra of the antiferromagnetic α-MnS
Коллективы : Российская академия наук, Физико-технический институт им. А.Ф. Иоффе РАН, "Spin Waves", International Symposium
Место публикации : International Symposium "Spin Waves 2018": Program. - 2018. - Sec. 3: Magnonics and propagation of spin waves. - 3-1
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nikitin S. E., Wu L. S., Sefat A. S., Shaykhutdinov K. A., Lu Z., Meng S., Pomjakushina, E., V, Conder K., Ehlers G., Lumsden M. D., Kolesnikov, A., I, Barilo S., Guretskii S. A., Inosov D. S., Podlesnyak A.
Заглавие : Decoupled spin dynamics in the rare-earth orthoferrite YbFeO3: Evolution of magnetic excitations through the spin-reorientation transition
Коллективы : US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division; German Research Foundation (DFG) [SFB 1143]; International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM); Laboratory Directed Research and Development Program of Oak Ridge National Laboratory; BFFR [F18KI-022]
Место публикации : Phys. Rev. B. - 2018. - Vol. 98, Is. 6. - Ст.064424. - ISSN 2469-9950, DOI 10.1103/PhysRevB.98.064424. - ISSN 2469-9969(eISSN)
Примечания : Cited References: 70. - We would like to thank A. Sukhanov, O. Stockert, and P. Thalmeier for useful discussions. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory. Part of this work was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. D.S.I. acknowledges funding by the German Research Foundation (DFG) through the Collaborative Research Center SFB 1143 at the TU Dresden (project C03). S.E.N. acknowledges support from the International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM). L.S.W. was supported by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US DOE. S.B. and S.A.G. are supported by BFFR, Grant No. F18KI-022
Предметные рубрики: MAGNON BOUND-STATES
ANTIFERROMAGNETIC CHAIN
NEUTRON-SCATTERING
Аннотация: In this paper, we present a comprehensive study of magnetic dynamics in the rare-earth orthoferrite YbFeO3 at temperatures below and above the spin-reorientation (SR) transition TSR=7.6K, in magnetic fields applied along the a,b, and c axes. Using single-crystal inelastic neutron scattering, we observed that the spectrum of magnetic excitations consists of two collective modes well separated in energy: 3D gapped magnons with a bandwidth of ∼60meV, associated with the antiferromagnetically (AFM) ordered Fe subsystem, and quasi-1D AFM fluctuations of ∼1meV within the Yb subsystem, with no hybridization of those modes. The spin dynamics of the Fe subsystem changes very little through the SR transition and could be well described in the frame of semiclassical linear spin-wave theory. On the other hand, the rotation of the net moment of the Fe subsystem at TSR drastically changes the excitation spectrum of the Yb subsystem, inducing the transition between two regimes with magnon and spinonlike fluctuations. At TTSR, the Yb spin chains have a well defined field-induced ferromagnetic (FM) ground state, and the spectrum consists of a sharp single-magnon mode, a two-magnon bound state, and a two-magnon continuum, whereas at TTSR only a gapped broad spinonlike continuum dominates the spectrum. In this work we show that a weak quasi-1D coupling within the Yb subsystem JYb-Yb, mainly neglected in previous studies, creates unusual quantum spin dynamics on the low-energy scales. The results of our work may stimulate further experimental search for similar compounds with several magnetic subsystems and energy scales, where low-energy fluctuations and underlying physics could be “hidden” by a dominating interaction.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Исхаков, Рауф Садыкович
Заглавие : Спин-волновой резонанс: явление, метод исследования и применение
Коллективы : Байкальская международная конференция "Магнитные материалы. Новые технологии", "Магнитные материалы. Новые технологии", Байкальская международная конференция, "Magnetic materials. New tecnologies", Baikal International Conference, Иркутский государственный университет
Место публикации : Магнитные материалы. Новые технологии: тез. докл. VIII Байкал. междунар. конф. BICMM-2018/ чл. прогр. ком. R. S. Iskhakov [et al.]. - Иркутск, 2018. - С. 43. - ISBN 978-5-00133-051-6
Примечания : Библиогр.: 2
РИНЦ,
Материалы конференции,
Материалы конференции,
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tarasov A. S., Bondarev I. A., Rautskii M. V., Lukyanenko A. V., Tarasov I. A., Varnakov S. N., Ovchinnikov S. G., Volkov N. V.
Заглавие : Room temperature spin accumulation effect in boron doped Si created by epitaxial Fe3Si/p-Si Schottky contact
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-42-243046, 16-42-242036, 16-42-243060]
Место публикации : J. Surf. Ingestig. - 2018. - Vol. 12, Is. 4. - P.633-637. - ISSN 1027-4510, DOI 10.1134/S1027451018040171. - ISSN 1819-7094(eISSN)
Примечания : Cited References: 33. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project nos. 16-42-243046, 16-42-242036 and 16-42-243060.
Предметные рубрики: HYBRID STRUCTURES
CURRENT-VOLTAGE
FILMS
TRANSPORT
SILICON
Ключевые слова (''Своб.индексиров.''): spintronics--hybrid structures--schottky diode--hanle effect--spin--accumulation
Аннотация: To study spin-dependent transport phenomena in Fe3Si/p-Si structures we fabricated 3-terminal planar microdevices and metal/semiconductor diode using conventional photolithography and wet chemical etching. IaEuro'V curve of prepared diode demonstrates rectifying behavior, which indicates the presence of Schottky barrier in Fe3Si/p-Si interface. Calculated Schottky barrier height is 0.57 eV, which can provide necessary conditions for spin accumulation in p-Si. Indeed, in 3-terminal planar device with Fe3Si/p-Si Schottky contact Hanle effect was observed. By the analysis of Hanle curves spin lifetime spin diffusion length in p-Si were calculated, which are 145 ps and 405 nm, respectively (at T = 300 K). Spin lifetime strongly depends on temperature which can be related to the fact that spin-dependent transport in our device is realized via the surface states. This gives a perspective of creation of spintronic devices based on metal/semiconductor structure without need for forming tunnel or Schottky tunnel contact.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Zlotnikov A. O.
Заглавие : Topological phase of coexisting superconductivity and 120-degree magnetic order on a triangular lattice
Место публикации : Bull. Russ. Acad. Sci. Phys. - 2018. - Vol. 82, Is. 5. - P.588-590. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873818050325
Примечания : Cited References: 12. - This study was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, and the Krasnoyarsk Territorial Foundation for Science and Technology, project nos. 16-02-00073, 17-42-240441, and 16-42-243069. A.O. Zlotnikov acknowledges the support of the RF Presidential Grant Council, project nos. SP-1370.2015.5 and MK-1398.2017.2.
Ключевые слова (''Своб.индексиров.''): linear combinations--nontrivial topology--self-consistent calculation--spin wave approximation--sublattice magnetization--superconducting order parameters--topological phase--triangular lattice
Аннотация: Using the t–J–V model, self-consistent calculations of the superconducting order parameter described by a linear combination of dx2−y2+idxy and p x + ip y chiral invariants are performed in the phase of coexistence with 120-degree magnetic ordering. Sublattice magnetization is determined in the spin-wave approximation for the case of half-filling. A nontrivial topology of the coexistence phase is demonstrated, testifying to the possibility of obtaining edge states and Majorana modes.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Fedoseev A. D.
Заглавие : Effect of total reflection from a symmetric two-channel device with fermion path nonanalyticity points induced by Rashba spin-orbit coupling
Место публикации : Bull. Russ. Acad. Sci. Phys. - 2018. - Vol. 82, Is. 5. - P.550-553. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873818050313
Примечания : Cited References: 8. - The reported study was funded by Russian Foundation for Basic Research (project nos. 16-42-242036, 16-42-243056, and 17-42-240441), Government of Krasnoyarsk Territory, and Krasnoyarsk Region Science and Technology Support Fund to the research (project nos. 22/17, 24/17, and 02/17).
Ключевые слова (''Своб.индексиров.''): electron transport--nonanalyticity--rashba spin-orbit coupling--regular polygon--spin-orbit couplings--symmetric systems--total reflection--transmission coefficients
Аннотация: The effect Rashba spin-orbit coupling has on transmission coefficient through a symmetric system with fermion path nonanalyticity points is illustrated using the example of a regular polygon-shaped chain. It is shown that the current passage through a device is blocked at the critical spin-orbit coupling values determined by the system’s geometry. At the near-critical spin-orbit coupling values, electron transport is possible only in a narrow range of energies.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Orlov Yu. S., Nikolaev S. V., Nesterov A. I., Ovchinnikova T. M.
Заглавие : Effect of the interatomic exchange interaction on the magnetic phase transitions in spin crossover systems under high-pressure
Место публикации : Phys. Solid State. - 2018. - Vol. 60, Is. 6. - P.1177-1179. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783418060276
Примечания : Cited References: 5. - This study was supported by the Russian Foundation for Basic Research, Government of the Kras-noyarsk Territory, and Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, projects nos. 16-42-243048 and 16-42-240413, the Grant Council of the President of the Russian Federation, project no. SP-1844.2016.1, and the Russian Foundation for Basic Research, projects nos. 16-02-00507, 16-02-00273, and 18-02-00453.
Аннотация: The phase diagram of an antiferromagnet with the spin crossover from the high-spin to low-spin state with S = 0 with increasing external pressure has been calculated with regard to the pressure dependence of the exchange integral. The calculated results are compared with the experimental data on ferropericlase Fe x Mg1 – xO.
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