Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTIVITY
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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Держатели документа:
[Donkov, A.
Korshunov, M. M.
Eremin, I.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.] Russian Acad Sci, Serbian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Eremin, I.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Lemmens, P.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Condensed Matter Phys, D-38106 Braunschweig, Germany
[Gnezdilov, V.] Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys, UA-61164 Kharkov, Ukraine
[Chou, F. C.] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan
[Lin, C. T.] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Institute fur Mathematische und Theoretische Physik, TU Braunschweig, D-38106 Braunschweig, Germany
Institute for Physics of Condensed Matter, TU Braunschweig, D-38106 Braunschweig, Germany
B. I. Verkin Institute for Low Temperature Physics, NASU, 61164 Kharkov, Ukraine
Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany
Доп.точки доступа:
Donkov, A.; Korshunov, M. M.; Коршунов, Максим Михайлович; Eremin, I.; Lemmens, P.; Gnezdilov, V.; Chou, F. C.; Lin, C. T.