Phason modes in spin-density wave in the presence of long-range Coulomb interaction

Дата и время публикации : 1993-11-24T15:26:14Z

Авторы публикации и институты :
Attila Virosztek
Kazumi Maki

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 7 pages, Revtex 2.1, SZFKI 102/93
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We study the effect of long-range Coulomb interaction on the phason in spin-density wave (SDW) within mean field theory. In the longitudinal limit and in the absence of SDW pinning the phason is completely absorbed by the plasmon due to the Anderson-Higgs mechanism. In the presence of SDW pinning or when the wave vector {bf q} is tilted from the chain direction, though the plasmon still almost exhausts the optical sum rule, another optical mode appears at $omega < 2Delta(T)$, with small optical weight. This low frequency mode below the SDW gap may be accessible to electron energy loss spectroscopy (EELS).

Category: Physics