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Title: Spin-Nernst effect in the paramagnetic regime of an antiferromagnetic insulator

Journal Article · · Physical Review B
 [1]; ORCiD logo [2];  [1]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States). Department of Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division

In this study, we theoretically investigate a pure spin Hall current driven by a longitudinal temperature gradient, i.e., the spin Nernst effect (SNE), in a paramagnetic state of a collinear antiferromagnetic insulator with the Dzyaloshinskii-Moriya interaction. The SNE in a magnetic ordered state in such an insulator was proposed by Cheng et al. [R. Cheng, S. Okamoto, and D. Xiao, Phys. Rev. Lett. 117, 217202 (2016)]. Here we show that the Dzyaloshinskii-Moriya interaction can generate a pure spin Hall current even without magnetic ordering. By using a Schwinger boson mean-field theory, we calculate the temperature dependence of SNE in a disordered phase. Lastly, we also discuss the implication of our results to experimental realizations.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725; SC0012509
OSTI ID:
1474614
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 3 Vol. 98; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (6)

Magnonic Floquet Quantum Spin Hall Insulator in Bilayer Collinear Antiferromagnets journal May 2019
Magnonic analog of the Edelstein effect in antiferromagnetic insulators journal January 2020
Thermal Hall Effect Induced by Magnon-Phonon Interactions journal October 2019
Intrinsic spin Nernst effect of magnons in a noncollinear antiferromagnet journal January 2020
Thermal Hall Effect Induced by Magnon-Phonon Interactions text January 2019
Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators text January 2019

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