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Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet

Journal Article · · Physical Review B
 [1];  [2];  [2]
  1. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Physics and Astronomy. Nebraska Center for Materials and Nanoscience; DOE/OSTI
  2. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Physics and Astronomy. Nebraska Center for Materials and Nanoscience
We formulate a microscopic linear response theory of magnon pumping applicable to multiple-magnonic-band uniform ferromagnets with Dzyaloshinskii-Moriya interactions. From the linear response theory, we identify the extrinsic and intrinsic contributions where the latter is expressed via the Berry curvature of magnonic bands. We observe that in the presence of a time-dependent magnetization Dzyaloshinskii-Moriya interactions can act as fictitious electric fields acting on magnons. We study various current responses to this fictitious field and analyze the role of Berry curvature. In particular, we obtain an analog of the Hall-like response in systems with nontrivial Berry curvature of magnon bands. After identifying the magnon-mediated contribution to the equilibrium Dzyaloshinskii-Moriya interaction, we also establish the Onsager reciprocity between the magnon mediated thermal torques and heat pumping. We apply our theory to the magnonic heat pumping and torque responses in honeycomb and kagome lattice ferromagnets.
Research Organization:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014189
OSTI ID:
1535899
Alternate ID(s):
OSTI ID: 1349960
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 16 Vol. 95; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (6)

Magnonic analog of the Edelstein effect in antiferromagnetic insulators journal January 2020
Magnonic topological insulators in antiferromagnets journal December 2017
Influence of spin-orbit and spin-Hall effects on the spin-Seebeck current beyond linear response: A Fokker-Planck approach journal January 2019
Magnon Spin-Momentum Locking: Various Spin Vortices and Dirac magnons in Noncollinear Antiferromagnets journal September 2017
Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators text January 2019
Magnonic topological insulators in antiferromagnets text January 2017

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