Topological spin excitations of Heisenberg antiferromagnets in two dimensions

Details Topological spin excitations of Heisenberg antiferromagnets in two dimensions Topological spin excitations of Heisenberg antiferromagnets in two dimensions

1999-05-10

arxiv.org/abs/cond-mat/9905115v1

PRL82,3504(1999)

Physics

Condensed Matter

Strongly Correlated Electrons

Latex file, no figure

Scientific paper

10.1103/PhysRevLett.82.3504

In this paper we discuss the construction and the dynamics of vortex-like
topological spin excitations in the Schwinger-boson description of Heisenberg
antiferromagnets in two dimensions. The topological spin excitations are Dirac
fermions (with gap) when spin value $S$ is a half-integer. Experimental and
theoretical implications of these excitations are being investigated.

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