Eliashberg theory: A short review

被引：101

作者：

Marsiglio, F. ^{[1
]}

机构：

[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada

来源：

ANNALS OF PHYSICS | 2020年 / 417卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

CHARGE-DENSITY-WAVE; ELECTRON-PHONON INTERACTION; TRANSITION-TEMPERATURE; LATTICE-VIBRATIONS; POLARON MOTION; HOLSTEIN MODEL; OF-STATES; SUPERCONDUCTIVITY; ENERGY; DEPENDENCE;

D O I：

10.1016/j.aop.2020.168102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Eliashberg theory is a theory of superconductivity that describes the role of phonons in providing the attractive interaction between two electrons. Phonon dynamics are taken into account, thus giving rise to retardation effects that impact the electrons, in the form of a frequency-dependent electron self-energy. In the superconducting state, this means that the order parameter, generally considered to be a static quantity in the Bardeen-Cooper-Schrieffer (BCS) theory, also becomes frequency dependent. Here we review the finite temperature formulation of Eliashberg theory, both on the imaginary and real frequency axis, and briefly display some examples of the consequences of a dynamical, as opposed to static, interaction. Along the way we point out where further work is required, concerning the validity of some of the assumptions used. (C) 2020 Elsevier Inc. All rights reserved.

引用

页数：23