Dirac and Chiral Quantum Spin Liquids on the Honeycomb Lattice in a Magnetic Field.
Phys Rev Lett
; 120(18): 187201, 2018 May 04.
Article
in En
| MEDLINE
| ID: mdl-29775347
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.
Full text:
1
Database:
MEDLINE
Type of study:
Prognostic_studies
Language:
En
Journal:
Phys Rev Lett
Year:
2018
Type:
Article
Affiliation country:
China