Dirac and Chiral Quantum Spin Liquids on the Honeycomb Lattice in a Magnetic Field

Physical Review Letters
Zheng-Xin Liu, B Normand

Abstract

Motivated by recent experimental observations in α-RuCl_{3}, we study the K-Γ model on the honeycomb lattice in an external magnetic field. By a slave-particle representation and variational Monte Carlo calculations, we reproduce the phase transition from zigzag magnetic order to a field-induced disordered phase. The nature of this state depends crucially on the field orientation. For particular field directions in the honeycomb plane, we find a gapless Dirac spin liquid, in agreement with recent experiments on α-RuCl_{3}. For a range of out-of-plane fields, we predict the existence of a Kalmeyer-Laughlin-type chiral spin liquid, which would show an integer-quantized thermal Hall effect.

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Citations

Dec 7, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Huan-Cheng YangZhong-Yi Lu
Jun 4, 2019·Proceedings of the National Academy of Sciences of the United States of America·Niravkumar D Patel, Nandini Trivedi
Jun 11, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Lukas Janssen, Matthias Vojta
Jun 7, 2019·Nature Communications·Jacob S GordonHae-Young Kee
Jul 28, 2019·Physical Review Letters·Preetha SahaGia-Wei Chern
Jun 13, 2020·Physical Review Letters·Arnaud Ralko, Jaime Merino
May 31, 2019·Physical Review Letters·Kira RiedlRoser Valentí
Nov 26, 2019·Physical Review Letters·Jiucai WangZheng-Xin Liu

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