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Chin. Phys. B, 2020, Vol. 29(9): 097501    DOI: 10.1088/1674-1056/ab9df0

Some experimental schemes to identify quantum spin liquids

Yonghao Gao(高永豪)1, Gang Chen(陈钢)2,1
1 State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China;
2 Department of Physics and HKU-UCAS Joint Institute for Theoretical and Computational Physics at Hong Kong, The University of Hong Kong, Hong Kong, China

Despite the apparent ubiquity and variety of quantum spin liquids in theory, experimental confirmation of spin liquids remains to be a huge challenge. Motivated by the recent surge of evidences for spin liquids in a series of candidate materials, we highlight the experimental schemes, involving the thermal Hall transport and spectrum measurements, that can result in smoking-gun signatures of spin liquids beyond the usual ones. For clarity, we investigate the square lattice spin liquids and theoretically predict the possible phenomena that may emerge in the corresponding spin liquids candidates. The mechanisms for these signatures can be traced back to either the intrinsic characters of spin liquids or the external field-driven behaviors. Our conclusion does not depend on the geometry of lattices and can broadly apply to other relevant spin liquids.

Keywords:  quantum spin liquids      fractionalization      neutron scattering      thermal Hall effect  
Received:  19 April 2020      Revised:  14 June 2020      Accepted manuscript online:  18 June 2020
PACS:  75.10.Kt (Quantum spin liquids, valence bond phases and related phenomena)  
  75.10.Jm (Quantized spin models, including quantum spin frustration)  
  61.05.fg (Neutron scattering (including small-angle scattering))  
  29.30.Hs (Neutron spectroscopy)  

Project supported by the National Key R&D Program of China (Grant Nos. 2016YFA0301001, 2018YFGH000095, and 2016YFA0300500), Shanghai Municipal Science and Technology Major Project, China (Grant No. 2019SHZDZX04), and the Research Grants Council of Hong Kong with General Research Fund, China (Grant No. 17303819).

Corresponding Authors:  Gang Chen     E-mail:

Cite this article: 

Yonghao Gao(高永豪), Gang Chen(陈钢) Some experimental schemes to identify quantum spin liquids 2020 Chin. Phys. B 29 097501

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