Nonadiabatic Contribution to the Quasiparticle Self-Energy in Systems with Strong Electron-Phonon Interaction

Дата и время публикации : 2000-07-11T16:12:14Z

Авторы публикации и институты :
O. V. Danylenko (Institut fuer Theoretische Physik, Universitaet Tuebingen, Germany)
O. V. Dolgov (Max-Planck-Institut fuer Festkoerperforschung, Stuttgart, Germany)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 20 pages, 4 figures
Первичная категория: cond-mat.supr-con

Все категории : cond-mat.supr-con, cond-mat.str-el

Краткий обзор статьи: 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.

Category: Physics