Migdal-Eliashberg 理论中的声子自能效应
超导电性
2021-01-29 v1
摘要
本文回顾了近期关于二维电子-声子模型的工作并给出了一些新结果。我们同时利用了量子蒙特卡洛模拟和 Migdal-Eliashberg 理论。所考虑的电子-离子耦合类型为在位耦合。竞争的不稳定性为电荷密度波（CDW）和单态超导。当电子能带半满时，电荷密度波占主导。偏离半满时，CDW 关联实际上抑制了超导。
引用
@article{arxiv.2101.12084,
title = {Phonon Self-Energy Effects in Migdal-Eliashberg Theory},
author = {F. Marsiglio},
journal= {arXiv preprint arXiv:2101.12084},
year = {2021}
}
备注
First appeared in 1991 in a conference proceedings, Electron--Phonon Interaction in Oxide Superconductors, edited by R. Baquero (World Scientific, Singapore, 1991) p.167. Since this source is relatively inaccessible, this arXiv version has been provided