Vortices in Schwinger-Boson Mean-Field Theory of Two-Dimensional Quantum Antiferromagnets

Дата и время публикации : 1995-04-19T05:23:07Z

Авторы публикации и институты :
Tai Kai Ng (Hong Kong University of Science and Technology)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 25 pages
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: In this paper we study the properties of vortices in two dimensional quantum antiferromagnets with spin magnitude S on a square lattice within the framework of Schwinger-boson mean field theory. Based on a continuum description, we show that vortices are stable topological excitations in the disordered state of quantum antiferromagnets. Furthermore, we argue that vortices can be divided into two kinds: the first kind always carries zero angular momentum and are bosons, whereas the second kind carries angular momentum S under favourable conditions and are fermions if S is half-integer. A plausible consequence of our results relating to RVB theories of High-Tc superconductors is pointed out.

Category: Physics