Halperin-Saslow modes as the origin of the low temperature anomaly in $NiG{a}_2{S}_4$

Abstract

The absence of magnetic long range order in the triangular lattice spin-1 antiferromagnet $NiGa$_2$S$_4$haspromptedthesearchforanovelquantumgroundstate.Inparticular,severalexperimentssuggestthepresenceofalinearlydispersingmodedespitenolong-rangemagneticorder.WeshowthattheanomalouslowtemperaturepropertiesofNiGa$_2$S$_4$ can naturally be explained by the formulation developed by Halperin and Saslow where the linearly dispersing Halperin-Saslow mode may exist in the background of frozen spin moments and zero net magnetization. We provide highly non-trivial consistency checks on the existing experimental data and suggest future experiments that can further confirm the existence of the Halperin-Saslow mode. Our results place strong constraints on any microscopic theory of this material.

arXiv comment5 pages, 1 figure

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Cited by in corpus (20)

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