Isotropic Spin Wave Theory of Short-Range Magnetic Order

Дата и время публикации : 1996-02-08T06:34:33Z

Авторы публикации и институты :
Alexander Sokol
Rajiv R. P. Singh
Norbert Elstner

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 4 pages, REVTeX v3 with 3 embedded PostScript figures
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We present an isotropic spin wave (ISW) theory of short-range order in Heisenberg magnets, and apply it to square lattice S=1/2 and S=1 antiferromagnets. Our theory has three identical (isotropic) spin wave modes, whereas the conventional spin wave theory has two transverse and one longitudinal mode. We calculate temperature dependences of various thermodynamic observables analytically and find good (several per cent) agreement with independently obtained numerical results in a broad temperature range.

Category: Physics