Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.187201
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Funding
- National Natural Science Foundation of China [11574392]
- Ministry of Science and Technology of China [2016YFA0300504]
- Fundamental Research Funds for the Central Universities [15XNLF19]
- Research Funds of Renmin University of China [15XNLF19]
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Motivated by recent experimental observations in alpha-RuCl3, we study the if - K=Gamma 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 alpha-RuCl3. 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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