1610.08463v1.pdf (2.59 MB)
Classical Spin Liquid Instability Driven By Off-Diagonal Exchange in Strong Spin-Orbit Magnets
journal contributionposted on 2018-07-03, 12:50 authored by Ioannis RousochatzakisIoannis Rousochatzakis, Natalia B. Perkins
© 2017 American Physical Society. We show that the off-diagonal exchange anisotropy drives Mott insulators with strong spin-orbit coupling to a classical spin liquid regime, characterized by an infinite number of ground states and Ising variables living on closed or open strings. Depending on the sign of the anisotropy, quantum fluctuations either fail to lift the degeneracy down to very low temperatures, or select noncoplanar magnetic states with unconventional spin correlations. The results apply to all 2D and 3D tricoordinated materials with bond-directional anisotropy and provide a consistent interpretation of the suppression of the x-ray magnetic circular dichroism signal reported recently for β-Li2IrO3 under pressure.
This work was supported by NSF Grant No. DMR-1511768. NP acknowledges the support of NSF GRANT No. PHY-1066293.
Published inPhysical Review Letters
CitationROUSOCHATZAKIS, I. and PERKINS, N.B., 2017. Classical spin liquid instability driven by off-diagonal exchange in strong spin-orbit magnets. Physical Review Letters, 118: 147204.
Publisher© American Physical Society
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis paper was accepted for publication in the journal Physical Review Letters and the definitive published version is available at https://doi.org/10.1103/PhysRevLett.118.147204