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Title: Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet

Abstract

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.

Authors:
 [1];  [1];  [1]
  1. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Physics and Astronomy. Nebraska Center for Materials and Nanoscience
Publication Date:
Research Org.:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1535899
Alternate Identifier(s):
OSTI ID: 1349960
Grant/Contract Number:  
SC0014189
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 16; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; spintronics; spin transfer torque; spin pumping; spin current; magnetic texture; ferromagnetism

Citation Formats

Kovalev, Alexey A., Zyuzin, Vladimir A., and Li, Bo. Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet. United States: N. p., 2017. Web. doi:10.1103/physrevb.95.165106.
Kovalev, Alexey A., Zyuzin, Vladimir A., & Li, Bo. Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet. United States. https://doi.org/10.1103/physrevb.95.165106
Kovalev, Alexey A., Zyuzin, Vladimir A., and Li, Bo. Wed . "Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet". United States. https://doi.org/10.1103/physrevb.95.165106. https://www.osti.gov/servlets/purl/1535899.
@article{osti_1535899,
title = {Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet},
author = {Kovalev, Alexey A. and Zyuzin, Vladimir A. and Li, Bo},
abstractNote = {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.},
doi = {10.1103/physrevb.95.165106},
journal = {Physical Review B},
number = 16,
volume = 95,
place = {United States},
year = {Wed Apr 05 00:00:00 EDT 2017},
month = {Wed Apr 05 00:00:00 EDT 2017}
}

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Cited by: 8 works
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Works referencing / citing this record:

Magnonic analog of the Edelstein effect in antiferromagnetic insulators
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Magnonic topological insulators in antiferromagnets
text, January 2017


Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators
text, January 2019