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Title: Magnetic field induced spin liquids in S = 1 Kitaev honeycomb model

Journal Article · · Physical Review Research

We investigate the ground state properties of the spin S = 1 Kitaev honeycomb model under a magnetic field based on the density matrix renormalization group (DMRG) calculation. With the time-reversal symmetry breaking due to the magnetic field, a gapped Kitaev spin liquid is identified for both ferromagnetic (FM) and antiferromagnetic (AFM) Kitaev couplings. The topological nature of such a Kitaev spin liquid is manifested by a nearly quantized Wilson loop, degeneracy in the entanglement spectra, and the existence of edge modes. While the FM Kitaev spin liquid is destroyed by a weaker magnetic field $$H_*^\text{FM}$$, the AFM one demonstrates a robustness up to an order of magnitude larger critical field $$H_*^\text{AFM}$$. Moreover, an intermediate nonmagnetic phase appears only for the AFM case at larger fields, $$H_*^\text{AFM} < H < H_{**}^\text{AFM}$$, before the transition to a high-field polarized paramagnet. The stability of the Kitaev spin liquid against the Heisenberg interactions is also examined. Our findings may further inspire the investigation of recently proposed S = 1 Kitaev materials.

Research Organization:
California State University, Northridge (CSUN), CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Science Foundation of China (NSFC); Ministry of Science and Technology of the People’s Republic of China (MOST)
Grant/Contract Number:
FG02-06ER46305; 2017YFA0302902
OSTI ID:
1631397
Alternate ID(s):
OSTI ID: 1830803; OSTI ID: 1834796; OSTI ID: 1864867
Journal Information:
Physical Review Research, Journal Name: Physical Review Research Vol. 2 Journal Issue: 2; ISSN 2643-1564
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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