Nonadiabatic contribution to the quasiparticle self-energy in systems with strong electron-phonon interaction

被引：16
作者：
Danylenko, OV
Dolgov, OV
机构：
[1] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany
[2] Max Planck Inst Festkorperforsch, D-70506 Stuttgart, Germany
来源：
PHYSICAL REVIEW B | 2001年 / 63卷 / 09期
关键词：
D O I：
10.1103/PhysRevB.63.094506
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate effects of a nonadiabatic electron-phonon(boson) interaction on the quasiparticle self-energy in the lowest order in the coupling constant. Existing approaches either overestimate or underestimate these effects because of different approximations for momentum and frequency dependences of the vertex corrections. The connection between the nonadiabaticity and a possible instability of the interacting Fermi system is discussed as well.
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页数：9
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共 33 条
  • [1] Abrikosov AA., 1975, Methods of Quantum Field Theory in Statistical Physics
  • [2] Theory of superconducting T-c of doped fullerenes
    Alexandrov, AS
    Kabanov, VV
    [J]. PHYSICAL REVIEW B, 1996, 54 (05) : 3653 - 3659
  • [3] ALLEN PB, 1982, SOLID STATE PHYS, V37, P1
  • [4] SUPERCONDUCTIVITY BEYOND MIGDAL THEOREM AND HIGH-T(C) PHENOMENOLOGY
    BENEDETTI, P
    GRIMALDI, C
    PIETRONERO, L
    VARELOGIANNIS, G
    [J]. EUROPHYSICS LETTERS, 1994, 28 (05): : 351 - 356
  • [5] Born M, 1927, ANN PHYS-BERLIN, V84, P0457
  • [6] VERTEX CORRECTION TO THE ELIASHBERG EQUATION FOR THE SUPERCONDUCTING CRITICAL-TEMPERATURE
    CAI, J
    LEI, XL
    XIE, LM
    [J]. PHYSICAL REVIEW B, 1989, 39 (16): : 11618 - 11623
  • [7] Superconducting critical temperature via a nonperturbative calculation of the vertex function
    Cosenza, F
    De Cesare, L
    Girard, MF
    [J]. PHYSICAL REVIEW B, 1999, 59 (05) : 3349 - 3352
  • [8] Normal and superconducting state in the presence of forward electron-phonon and impurity scattering
    Danylenko, OV
    Dolgov, OV
    Kulic, ML
    Oudovenko, V
    [J]. EUROPEAN PHYSICAL JOURNAL B, 1999, 9 (02) : 201 - 206
  • [9] Non-adiabatic corrections to the quasiparticle self-energy
    Danylenko, OV
    Dolgov, OV
    Losyakov, VV
    [J]. CZECHOSLOVAK JOURNAL OF PHYSICS, 1996, 46 : 925 - 926
  • [10] The Ward identity and nonadiabatic corrections to the quasiparticle self-energy
    Danylenko, OV
    Dolgov, OV
    Losyakov, VV
    [J]. PHYSICS LETTERS A, 1997, 230 (1-2) : 79 - 82
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