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...

Full description

Saved in:
Bibliographic Details
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
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.113.187201