Impurity spin dynamics in 2D antiferromagnets and superconductors

Дата и время публикации : 2000-02-20T18:17:36Z

Авторы публикации и институты :
Matthias Vojta (Yale University)
Chiranjeeb Buragohain (Yale University)
Subir Sachdev (Yale University)

Ссылка на журнал-издание: Physica C 341-348, 327 (2000)
Коментарии к cтатье: 2 pages, 1 fig. Proceedings of the M2S-HTSC-VI conference, Houston 2000, submitted to Physica C. More details can be found in cond-mat/9912020
Первичная категория: cond-mat.str-el

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

Краткий обзор статьи: We discuss the universal theory of localized impurities in the paramagnetic state of 2D antiferromagnets where the spin gap is assumed to be significantly smaller than a typical exchange energy. We study the impurity spin susceptibility near the host quantum transition from a gapped paramagnet to a Neel state, and we compute the impurity-induced damping of the spin-1 mode of the gapped antiferromagnet. Under suitable conditions our results apply also to d-wave superconductors.

Category: Physics