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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S.
Заглавие : Influence of spin-phonon coupling on the magnetic moment in 2D spin-1/2 antiferromagnet
Место публикации : Phys. Lett. A. - 2003. - Vol. 313, Is. 1-2. - P.122-125. - ISSN 0375-9601, DOI 10.1016/S0375-9601(03)00689-3
Примечания : Cited References: 17
Предметные рубрики: SQUARE LATTICE
EU2CUO4
MODEL
Ключевые слова (''Своб.индексиров.''): 2d heisenberg model--spin-phonon interactions--2d heisenberg model--spin-phonon interactions--ferromagnetic material--anisotropy--article--liquid--magnetism--mathematical model--monte carlo method--quantum theory--thermal conductivity--vibration
Аннотация: The ground state of two-dimensional Heisenberg spin-1/2 antiferromagnet (AF) with the spin-phonon coupling is studied by the quantum Monte Carlo method. The magnetic moment per site, mean-square vibration of ion, phase diagram of AF long range order-quantum spin. liquid are simulated. The spin-phonon coupling is estimated for R2CuO4, R = Gd, Eu. (C) 2003 Elsevier Science B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S.
Заглавие : Quantum magnetostriction oscillations in a two-dimensional antiferromagnet with spin-phonon interaction in a magnetic field
Место публикации : JETP Letters. - 2004. - Vol. 79, Is. 1. - P.53-56. - ISSN 0021-3640, DOI 10.1134/1.1675922
Примечания : Cited References: 7
Предметные рубрики: LADDERS
Аннотация: The ground state of a two-dimensional antiferromagnet with S = 1/2 interacting with acoustic phonons in a magnetic field was studied by the quantum Monte Carlo method in the nonadiabatic approximation. Oscillations of the amplitude of the root-mean-square displacement of ions and the average phonon occupation number in a magnetic field were found. Local maxima were revealed in the distribution functions of site magnetic moments and ion displacements. The saturation magnetization was calculated as a function of the spin-phonon coupling constant. (C) 2004 MAIK "Nauka / Interperiodica".
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S.
Заглавие : Two-dimensional quantum spin liquid with S=1/2 spins interacting with acoustic phonons
Разночтения заглавия :авие SCOPUS: Two-dimensional quantum spin liquid with S = 1/2 spins interacting with acoustic phonons
Место публикации : Phys. Lett. A. - 2004. - Vol. 333, Is. 5-6. - P.446-449. - ISSN 0375-9601, DOI 10.1016/j.physleta.2004.10.064
Примечания : Cited References: 11
Предметные рубрики: ANTIFERROMAGNET
Ключевые слова (''Своб.индексиров.''): spin-phonon interactions--spin-liquid--spinon excitations--spin-liquid--spin-phonon interactions--spinon excitations--ferromagnetic material--acceleration--acoustics--article--density--energy--liquid--magnetic field--mathematical analysis--monte carlo method--phonon--quantum mechanics
Аннотация: The spin density of states of a two-dimensional antiferromagnet in magnetic field having spins-1/2 and interacting with acoustic phonons is investigated in the nonadiabatic approximation using the quantum Monte Carlo method. It is found the gap energy A in the single particle spin excitations spectrum closes at magnetic field Delta similar or equal to H-c, W-ph W-s and Delta similar or equal to (1/2)H-c, W-ph W-s, where W-ph and W-s are the bandwidths of phonon and spin excitations in antiferromagnet. (C) 2004 Elsevier B.V All rights reserved.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shneyder E., Ovchinnikov S.
Заглавие : BCS-type Theory for the Sum of Magnetic and Phonon Coupling in high-Tc Cuprates
Коллективы : International Conference on Magnetism
Место публикации : 18th International Conference on Magnetism (ICM-2009). - 2009. - Ст.Mo-A-5.1-03
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Berzhanskii V. N., Ivanov V. I.
Заглавие : Spin-phonon relaxation processes in CDCR2SE4 crystals
Место публикации : Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 4. - P.1233-1235. - ISSN 0367-3294
Примечания : Cited References: 10
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boldyrev K. N., Stanislavchuk T. N., Sirenko A. A., Kamenskyi D., Bezmaternykh L. N., Popova M. N.
Заглавие : Bifurcations observed in the spectra of coupled electron-phonon modes in multiferroic PrFe3(BO3)4 subjected to a magnetic field [Electronic resource]
Место публикации : ArXiv. - 2016. - Ст.1609.02125
Вид и объем ресурса: Electronic text data
Примечания : Cited References: 19. - This research was supported by the Russian Scientific Foundation under Grant No 14-12-01033, the President of Russian Federation (MK-3521-2015.2, K.N.B.), and the U.S. Department of Energy under Grant No DE-FG02-07ER46382 (experiments at U4-IR beamline NSLS-BNL, T.N.S. and A.A.S.). The National Synchrotron Light Source is operated as a User Facility for he U.S. Department of Energy under Contract No. DE-AC02-98CH10886. Part of this work was supported by EMFL (contract No. 26211). M.N.P. thanks B.Z. Malkin helpful discussions.
Аннотация: We report on bifurcations effect mediated by the electron-phonon coupling in a concentrated rare-earth-containing antiferromagnet, observed in the spectra of coupled 4f-electron-phonon modes under the influence of an external magnetic field. The effect was observed in the low-temperature far-infrared (terahertz) reflection spectra of a multiferroic easy-axis antiferromagnet PrFe3(BO3)4 in magnetic fields Bext||c. Both paramagnetic and magnetically ordered phases (including a spin-flop one) were studied in magnetic fields up to 30 T. We show that the field behavior of the coupled modes can be successfully explained and modeled on the base of the equation derived in the frame of the theory of coupled electron-phonon modes, with the same field-independent electron-phonon interaction constant |W|=14.8cm−1.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boldyrev K. N., Stanislavchuk T. N., Sirenko A. A., Kamenskyi D., Bezmaternykh L. N., Popova M. N.
Заглавие : Bifurcations of coupled electron-phonon modes in an antiferromagnet subjected to a magnetic field
Место публикации : Phys. Rev. Lett.: American Physical Society, 2017. - Vol. 118, Is. 16. - Ст.167203. - ISSN 00319007 (ISSN), DOI 10.1103/PhysRevLett.118.167203
Примечания : Cited References: 26. - This research was supported by the Russian Scientific Foundation under Grant No. 14-12-01033, the President of Russian Federation (MK-3577.2017.2, K. N. B.), and the U.S. Department of Energy under Grant No. DE-FG02-07ER46382 (experiments at U4-IR beam line NSLS-BNL, T. N. S. and A. A. S.). The National Synchrotron Light Source is operated as a user facility for the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. Part of this work was supported by EMFL (Contract No. 26211). M. N. P. thanks B. Z. Malkin and A. V. Popov for helpful discussions.
Ключевые слова (''Своб.индексиров.''): antiferromagnetic materials--bifurcation (mathematics)--electron-phonon interactions--electrons--magnetic fields--magnetism--temperature--antiferromagnetic crystals--bifurcation points--electron phonon couplings--electronic excitation--external magnetic field--field independents--low temperatures--reflection spectra--phonons
Аннотация: We report on a new effect caused by the electron-phonon coupling in a stoichiometric rare-earth antiferromagnetic crystal subjected to an external magnetic field, namely, the appearance of a nonzero gap in the spectrum of electronic excitations in an arbitrarily small field. The effect was registered in the low-temperature far-infrared (terahertz) reflection spectra of an easy-axis antiferromagnet PrFe3(BO3)4 in magnetic fields Bext-c. Both paramagnetic and magnetically ordered phases (including a spin-flop one) were studied in magnetic fields up to 30 T, and two bifurcation points were observed. We show that the field behavior of the coupled modes can be successfully explained and modeled on the basis of the equation derived in the framework of the theory of coupled electron-phonon modes, with the same field-independent electron-phonon interaction constant |W|=14.8 cm-1. © 2017 American Physical Society.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Orlov Yu. S., Sokolov A. Е., Dudnikov V. A., Shulga K. V., Volochaev M. N., Zharkov S. M., Shestakov N. P., Vysotin M. A., Ovchinnikov S. G.
Заглавие : Contribution of the multiplicity fluctuation in the temperature dependence of phonon spectra of rare-earth cobaltites
Место публикации : Molecules. - 2020. - Vol. 25, Is. 18. - Ст.4316. - ISSN 14203049 (ISSN), DOI 10.3390/molecules25184316
Примечания : Cited References: 34. - This work was supported by the Russian Science Foundation grant 18-02-00022. The scanning electron microscopy investigations were conducted in the SFU Joint Scientific Center, supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation. The other research was carried out at the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS”
Аннотация: We have studied, both experimentally and theoretically, the unusual temperature dependence of the phonon spectra in NdCoO3, SmCoO3 and GdCoO3, where the Co3+ ion is in the low-spin (LS) ground state, and at the finite temperature, the high-spin (HS) term has a nonzero concentration nHS due to multiplicity fluctuations. We measured the absorption spectra in polycrystalline and nanostructured samples in the temperature range 3–550 K and found a quite strong breathing mode softening that cannot be explained by standard lattice anharmonicity. We showed that the anharmonicity in the electron–phonon interaction is responsible for this red shift proportional to the nHS concentration.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boldyrev K. N., Stanislavchuk T. N., Sirenko A. A., Bezmaternykh L. N., Popova M. N.
Заглавие : Coupling between phonon and crystal-field excitations in multiferroic PrFe3(BO3)4
Коллективы : Russian Scientific Foundation [14-12-01033]; President of Russian Federation [MK-1700.2013.2]; U.S. Department of Energy [DE-FG02-07ER46382, DE-AC02-98CH10886]
Место публикации : Phys. Rev. B: American Physical Society, 2014. - Vol. 90, Is. 12. - Ст.121101. - ISSN 1098-0121, DOI 10.1103/PhysRevB.90.121101. - ISSN 1550-235X
Примечания : Cited References: 35. - This research was supported by the Russian Scientific Foundation under Grant No. 14-12-01033, the President of Russian Federation (MK-1700.2013.2; K.N.B.), and the U.S. Department of Energy under Grant No. DE-FG02-07ER46382 (experiments at U4-IR beamline NSLS-BNL; T.N.S. and A.A.S.). The National Synchrotron Light Source is operated as a User Facility for the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. M.N.P. thanks B. Z. Malkin for drawing her attention to the work [33] and for helpful discussions.
Предметные рубрики: MAGNETOELECTRIC PROPERTIES
GROUND-STATE
SM
Аннотация: Far-infrared reflection and ellipsometry measurements on multiferroic PrFe3(BO3)4 and SmFe3(BO3)4 single crystals were used to investigate the interaction between lattice phonons and electronic excitations associated with 4f crystal-field transitions. A temperature-dependent interference between two types of excitations was observed in PrFe3(BO3)4 in which the frequency of 4f crystal-field electronic excitation of Pr3+ falls into the TO-LO frequency interval of the optical phonon mode near 50 cm−1 (1.5 THz). Experimental data were explained on the basis of a theoretical model of coupled electron-phonon modes. The fitting procedure revealed the value 14.8 cm−1 for the electron-phonon coupling constant. This rather large value points to an essential role played by the electron-phonon interaction in the physics of multiferroics.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shneyder E. I., Spitaler J., Kokorina E. E., Nekrasov I. A., Gavrichkov V. A., Draxl C., Ovchinnikov S. G.
Заглавие : Coupling of Hubbard fermions with phonons in La2 CuO4: A combined study using density-functional theory and the generalized tight-binding method
Место публикации : J. Alloys Compd.: Elsevier, 2015. - Vol. 648. - P.258-264. - ISSN 0925-8388, DOI 10.1016/j.jallcom.2015.05.150
Примечания : Cited References: 60. - We acknowledge the stimulating discussions with V.V. Val'kov, D.M. Dzebisashvilly, M.M. Korshunov and I.S. Sandalov. E.I.S. and S.G.O. are thankful to the Russian Science Foundation (project No. 14-12-00061) for the support of the research given in Sections 2, 6 and 7. E.E.K. and I.A.N. are thankful to the State Contract No. 0389-2014-0001 and RFBR grant No. 14-02-00065 for the support of the research given in Section 5. Financial support of the research given in Sections 3 and 4 by the Austrian Federal Government (in particular from Bundesministerium fur Verkehr, Innovation und Technologie and Bundesministerium fur Wissenschaft, Forschung und Wirtschaft) represented by Osterreichische Forschungsforderungsgesellschaft mbH and the Styrian and the Tyrolean Provincial Government, represented by Steirische Wirtschaftsforderungsgesellschaft mbH and Standortagentur Tirol, within the framework of the COMET Funding Programme is gratefully acknowledged by C.D. and J.S.
Предметные рубрики: MEAN-FIELD THEORY
LINEAR-RESPONSE THEORY
CUPRATE SUPERCONDUCTORS
ELECTRONIC-STRUCTURE
CORRELATED SYSTEMS
LATTICE-DYNAMICS
BAND-STRUCTURE
LA2CUO4
MODEL
LA2-XSRXCUO4
Ключевые слова (''Своб.индексиров.''): high-temperature superconductivity--electron-phonon coupling--density-functional theory--generalized tight-binding approach
Аннотация: We present results for the electron-phonon interaction of the Γ-point phonons in the tetragonal high-temperature phase of La2 CuO4 obtained from a hybrid scheme, combining density-functional theory (DFT) with the generalized tight-binding approach. As a starting point, eigenfrequencies and eigenvectors for the Γ-point phonons are determined from DFT within the frozen phonon approach utilizing the augmented plane wave + local orbitals method. The so obtained characteristics of electron-phonon coupling are converted into parameters of the generalized tight-binding method. This approach is a version of cluster perturbation theory and takes the strong on-site electron correlations into account. The obtained parameters describe the interaction of phonons with Hubbard fermions which form quasiparticle bands in strongly correlated electron systems. As a result, it is found that the Γ-point phonons with the strongest electron-phonon interaction are the A2u modes (236 cm-1, 131 cm-1 and 476 cm-1). Finally it is shown, that the single-electron spectral-weight redistribution between different Hubbard fermion quasiparticles results in a suppression of electron-phonon interaction which is strongest for the triplet Hubbard band with z oriented copper and oxygen electrons. © 2015 Elsevier B.V. All rights reserved.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Deich L. I.
Заглавие : On far-infrared attenuation in glasses
Место публикации : Phonon scattering in condensed matter: proceedings: Springer Verlag, 1993. - Vol. 112. - P.233-234. - (Springer series in solid-state sciences). - ISBN 0171-1873. - ISBN 3-540-56395-4
Примечания : Cited References: 0
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Deich L. I., Ignatchenko V. A.
Заглавие : Phonon spectroscopy of inhomogeneities in disordered solids
Разночтения заглавия :us: Phonon spectroscopy of inhomogeneties in disordered solids
Место публикации : Solid State Commun. - 1991. - Vol. 80, Is. 10. - P.881-884. - ISSN 0038-1098, DOI 10.1016/0038-1098(91)90525-Z
Примечания : Cited References: 15
Предметные рубрики: SPIN-WAVES
AMORPHOUS FILMS
DISPERSION
FERROMAGNETS
Аннотация: A possibility to use elastic waves for investigation of inhomogeneities corresponding in size to intermediate order in disordered solids is considered. It is shown that frequency dependencies of phase and group velocities of the elastic waves have some peculiarities which give the possibilities to find the characteristic size of inhomogenities and to determine the parameter of a matter whose fluctuations are most significant for the phenomena under study.
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13.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Deich L. I., Ignatchenko V. A.
Заглавие : Polarization properties of elastic-waves in anisotropic disordered media
Коллективы : International Conference on Phonon Scattering in Condensed Matter
Место публикации : Phonon scattering in condensed matter: proceedings: Springer Verlag, 1993. - Vol. 112. - P.231-232. - (Springer series in solid-state sciences). - ISBN 0171-1873. - ISBN 3-540-56395-4
Примечания : Cited References: 0
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14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Orlov Yu. S., Nikolaev S. V., Kuz'min V. I., Ovchinnikov S. G.
Заглавие : Effect of the electron-phonon interaction on the formation of the exciton phase in strongly correlated systems with the spin crossover
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. H: Magnetism of strongly correlated electron systems. - Ст.H.P15. - P.104-105. - ISBN 978-5-94469-051-7
Примечания : Cited References: 4. - The study was supported by the Russian Scientiʅc Foundation, the Krasnoyarsk Regional Fund of Science, grant No. 22-22-20007
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shneyder E. I., Makarov I. A., Zotova M. V., Nikolaev S. V., Ovchinnikov S. G.
Заглавие : Effects of electron-phonon interaction in strongly correlated copper oxides systems within alternative versions of generalized tight-binding method
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.O2.1. - P.135. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 3. - Authors are thankful to Russian Science Foundation (project No. 14-12-00061) for financial support
Ключевые слова (''Своб.индексиров.''): electron-phonon interaction--strongly correlated electron systems
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Donkov A., Korshunov M.M., Eremin I., Lemmens P., Gnezdilov V., Chou F.C., Lin C.T.
Заглавие : Electron phonon interaction in the lamellar cobaltate NaxCoO2
Место публикации : Phys. Rev. B. - 2008. - Vol. 77. - С. 100504(R)
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Gavrichkov V. A., Korshunov M. M., Shneyder E. I.
Заглавие : Electron structure and electron-phonon interaction in the strongly correlated electron system of cuprates
Место публикации : Low Temp. Phys. - 2006. - Vol. 32, Is. 4-5. - P.483-488. - ISSN 1063-777X, DOI 10.1063/1.2199450; \b Физика низких температур
Примечания : Cited References: 37
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
HIGH-TC SUPERCONDUCTIVITY
C SUPERCONDUCTORS
J MODEL
BAND
REPRESENTATION
REGIME
OXIDES
Аннотация: The generalized tight-binding method presents a practical realization of the scheme that describes quasiparticles in a strongly correlated electron system and consists of exact intra-cell diagonalization of the model Hamiltonian and perturbative treatment of the inter-cell hoppings. In the present paper this method and its ab initio modification are applied to undoped and weakly doped HTSC cuprates. Results are in very good agreement with the experimental ARPES data on various compounds. Starting with a multiband p-d model the realistic effective low-energy Hamiltonian of strongly correlated electrons interacting with spin fluctuations and phonons is derived both for hole- and electron-doped systems. Without electron-phonon interaction the pure magnetic mechanism of pairing does not provide the correct value of T, even for single-layer La2-xSrxCuO4 and Nd2-xCexCuO4. (c) 2006 American Institute of Physics.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Donkov A., Eremin I., Knolle J., Korshunov M. M.
Заглавие : Electron-Phonon Interaction and Phonon Renormalization in the Lamellar Cobaltate NaxCoO2
Разночтения заглавия :авие SCOPUS: Electron-phonon interaction and phonon renormalization in the lamellar cobaltate Na x CoO 2
Место публикации : J. Supercond. Nov. Magn.: SPRINGER, 2009. - Vol. 22: International Conference on Quantum Phenomena in Complex Matters (JUL 26-AUG 01, 2008, Erice, ITALY), Is. 1. - P37-40. - ISSN 1557-1939, DOI 10.1007/s10948-008-0372-6
Примечания : Cited References: 16
Предметные рубрики: SUPERCONDUCTIVITY
Ключевые слова (''Своб.индексиров.''): electron-phonon interaction--superconductivity--sodium cobaltate--electron-phonon interaction--sodium cobaltate--superconductivity--brillouin zones--cobaltate--conducting electrons--conduction electrons--doping dependences--feedback effects--matrix elements--phonon frequencies--phonon modes--raman experiments--renormalization--sodium cobaltate--sodium cobaltates--atoms--cobalt compounds--critical current density (superconductivity)--electric conductivity--electron-phonon interactions--electrons--flow interactions--penetration depth (superconductivity)--sodium--superconductivity--phonons
Аннотация: We study theoretically the electron-phonon interaction in NaxCoO2. For the A(1g) and E-1g phonon modes found in Raman experiments, we calculate the matrix elements of the electron-phonon interaction. Analyzing the feedback effect of the conduction electrons on the phonon frequency., we investigate the doping dependence of these two phonon modes. Due to the momentum dependence of the electron-phonon interaction, we find the strongest renormalization of the E-1g mode around the Brillouin zone boundary which should be observed in the neutron scattering. At the same time, the A(1g) mode shows the strongest coupling to the conducting electrons around the G point and reveals its doping dependence in the Raman experiments. Our results shed light on the possible importance of the electron-phonon interaction in the lamellar sodium cobaltates.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Donkov A., Korshunov M. M., Eremin I., Lemmens P., Gnezdilov V., Chou F. C., Lin C. T.
Заглавие : Electron-phonon interaction in the lamellar cobaltate Na(x)CoO(2)
Разночтения заглавия :авие SCOPUS: Electron-phonon interaction in the lamellar cobaltate Nax CoO2
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2008. - Vol. 77, Is. 10. - Ст.100504. - ISSN 1098-0121, DOI 10.1103/PhysRevB.77.100504
Примечания : Cited References: 42
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTIVITY
Аннотация: We study theoretically and experimentally the dependence of the electron-phonon interaction in Na(x)CoO(2) on the sodium concentration x. For the two oxygen phonon modes found in Raman experiments, A(1g) and E(1g), we calculate the matrix elements of the electron-phonon interaction. Analyzing the feedback effect of the conduction electrons on the phonon frequency we compare the calculated and experimentally observed doping dependence of the A(1g) mode. Furthermore, due to the momentum dependence of the electron-phonon coupling for the E(1g) symmetry we find no renormalization of the corresponding phonon frequency which agrees with experiment. Our results shed light on the possible importance of the electron-phonon interaction in this system.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Hu J., Liu X., Yue C. L., Liu J. Y., Zhu H. W., He J. B., Wei J., Mao Z. Q., Antipina, L. Yu., Popov Z. I., Sorokin P.B., Liu T.J., Adams P.W., Radmanesh S. M. A., Spinu L., Ji H., Natelson D.
Заглавие : Enhanced electron coherence in atomically thin Nb3SiTe6
Коллективы : US National Science Foundation [DMR-1205469], NSF EPSCoR Cooperative Agreement [EPS-1003897], Louisiana Board of Regents; US Department of Energy, Office of Science, Basic Energy Sciences [DE-FG02-07ER46420], Russian Science Foundation [14-12-01217], Russian Federation [MK-6218.2015.2, 14.Z56.15.6218-MK], Leading Science School program [NSh-2886.2014.2], US Department of Energy, Office of Science, Basic Energy Sciences award [DE-FG02-06ER46337], US National Science Foundation under the NSF EPSCoR Cooperative Agreement [EPS-1003897]
Место публикации : Nat. Phys. - 2015. - Vol. 11, Is. 6. - P.471-476. - ISSN 1745, DOI 10.1038/NPHYS3321. - ISSN 17452481(eISSN)
Примечания : Cited References:38. - The authors are grateful to J. DiTusa for informative discussions. The work at Tulane is supported by the US National Science Foundation under grant DMR-1205469 and the NSF EPSCoR Cooperative Agreement No. EPS-1003897, with additional support from the Louisiana Board of Regents. P.W.A. and T.J.L. acknowledge the support of the US Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-FG02-07ER46420. L.Y.A. and P.B.S. acknowledge the support of the Russian Science Foundation (project #14-12-01217) and are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences and 'Lomonosov' Research Computing Center for the opportunity of using a cluster computer for the quantum-chemical calculations. P.B.S. acknowledges a Grant of the President of the Russian Federation for government support of young PhD scientists MK-6218.2015.2 (project ID 14.Z56.15.6218-MK). Z.I.P. acknowledges the support of the Leading Science School program (No NSh-2886.2014.2). D.N. and H.J. acknowledge support through the US Department of Energy, Office of Science, Basic Energy Sciences award DE-FG02-06ER46337. The work at UNO is supported by the US National Science Foundation under the NSF EPSCoR Cooperative Agreement No. EPS-1003897, with additional support from the Louisiana Board of Regents.
Предметные рубрики: PHONON SCATTERING RATES
WEAK-LOCALIZATION
METAL-FILMS
Аннотация: It is now well established that many of the technologically important properties of two-dimensional (2D) materials, such as the extremely high carrier mobility in graphene(1) and the large direct band gaps in MoS2 monolayers(2), arise from quantum confinement. However, the influence of reduced dimensions on electron-phonon (e-ph) coupling and its attendant dephasing effects in such systems has remained unclear. Although phonon confinement(3-7) is expected to produce a suppression of e-ph interactions in 2D systems with rigid boundary conditions(6,7), experimental verification of this has remained elusive(8). Here, we show that the e-ph interaction is, indeed, modified by a phonon dimensionality crossover in layered Nb3SiTe6 atomic crystals. When the thickness of the Nb3SiTe6 crystals is reduced below a few unit cells, we observe an unexpected enhancement of the weak-antilocalization signature in magnetotransport. This finding strongly supports the theoretically predicted suppression of e-ph interactions caused by quantum confinement of phonons.
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