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Theory of the Thermal Hall Effect in Quantum Magnets

Author(s)
Katsura, Hosho; Nagaosa, Naoto; Lee, Patrick A.
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Abstract
We present a theory of the thermal Hall effect in insulating quantum magnets, where the heat current is totally carried by charge-neutral objects such as magnons and spinons. Two distinct types of thermal Hall responses are identified. For ordered magnets, the intrinsic thermal Hall effect for magnons arises when certain conditions are satisfied for the lattice geometry and the underlying magnetic order. The other type is allowed in a spin liquid which is a novel quantum state since there is no order even at zero temperature. For this case, the deconfined spinons contribute to the thermal Hall response due to Lorentz force. These results offer a clear experimental method to prove the existence of the deconfined spinons via a thermal transport phenomenon.
Date issued
2010-02
URI
http://hdl.handle.net/1721.1/57472
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Katsura, Hosho, Naoto Nagaosa, and Patrick A. Lee. "Theory of the Thermal Hall Effect in Quantum Magnets." Phys. Rev. Lett. 104, 066403 (2010)© 2010 The American Physical Society
Version: Final published version
ISSN
0031-9007

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