Raman scattering signatures of Kitaev spin liquids in A(2)IrO(3) iridates with A=Na or Li

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...

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Published in:Physical review letters 2014-10, Vol.113 (18), p.187201-187201
Main Authors: Knolle, J, Chern, Gia-Wei, Kovrizhin, D L, Moessner, R, Perkins, N B
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container_issue 18
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container_title Physical review letters
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creator Knolle, J
Chern, Gia-Wei
Kovrizhin, D L
Moessner, R
Perkins, N B
description 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 Z(2) 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.
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title Raman scattering signatures of Kitaev spin liquids in A(2)IrO(3) iridates with A=Na or Li
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