Rousochatzakis_et_al-2018-Nature_Communications.pdf (1.06 MB)
Quantum spin liquid in the semiclassical regime
journal contributionposted on 2018-07-03, 09:46 authored by Ioannis RousochatzakisIoannis Rousochatzakis, Yuriy Sizyuk, Natalia B. Perkins
© 2018 The Author(s). Quantum spin liquids (QSLs) have been at the forefront of correlated electron research ever since their proposal in 1973, and the realization that they belong to the broader class of intrinsic topological orders. According to received wisdom, QSLs can arise in frustrated magnets with low spin S, where strong quantum fluctuations act to destabilize conventional, magnetically ordered states. Here, we present a Z 2 QSL ground state that appears already in the semiclassical, large-S limit. This state has both topological and symmetry-related ground-state degeneracy, and two types of gaps, a "magnetic flux" gap that scales linearly with S and an "electric charge" gap that drops exponentially in S. The magnet is the spin-S version of the spin-1/2 Kitaev honeycomb model, which has been the subject of intense studies in correlated electron systems with strong spin-orbit coupling, and in optical lattice realizations with ultracold atoms.
Published inNature Communications
CitationROUSOCHATZAKIS, I., SIZYUK, Y. and PERKINS, N.B., 2018. Quantum spin liquid in the semiclassical regime. Nature Communications, 9: 1575.
Publisher© The authors. Published by Nature Communications
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Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
NotesThis is an Open Access Article. It is published by Nature Communications under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/