Topological spin excitations of Heisenberg antiferromagnets in two dimensions
Abstract
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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