Raman scattering signatures of Kitaev spin liquids in A2IrO3 iridates with A=Na or Li

J. Knolle, Gia Wei Chern, D. L. Kovrizhin, R. Moessner, N. B. Perkins

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Abstract

We show how Raman spectroscopy can serve as a valuable tool for diagnosing quantum spin liquids (QSL). We find that the Raman response of the gapless QSL of the Kitaev-Heisenberg model exhibits signatures of spin fractionalization into Majorana fermions, which give rise to a broad signal reflecting their density of states, and Z2 gauge fluxes, which also contribute a sharp feature. We discuss the current experimental situation and explore more generally the effect of breaking the integrability on response functions of Kitaev spin liquids.

Original languageEnglish (US)
Article number187201
JournalPhysical review letters
Volume113
Issue number18
DOIs
StatePublished - Oct 28 2014

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