Topological electromotive force from domain-wall dynamics in a ferromagnet
Name
Yang-2010-Topological electrom.pdf
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Author(s)
Yang, Shengyuan A.
Beach, Geoffrey Stephen
Knutson, Carl
Xiao, Di
Zhang, Zhenyu
Tsoi, Maxim
Niu, Qian
MacDonald, Allan H.
Erskine, James L.
Date Issued
August 2010
Journal
Physical Review B
Publisher
American Physical Society
Citation
Yang, Shengyuan A. et al. "Topological electromotive force from domain-wall dynamics in a ferromagnet." Physical Review B 82.5 (2010): 054410. © 2010 The American Physical Society
Version
Final published version
Abstract
We formulate a local gauge-invariant theory for the electromotive force induced by domain-wall dynamics in a ferromagnet. We demonstrate that this emf generation is a real-space topological pumping effect. The integral of the emf over one pumping period is a quantized topological invariant which does not depend on the details of the domain-wall configuration nor on its detailed dynamics. Based on our theory, the full instantaneous electric potential distribution can be mapped out by standard electrostatic methods. We also provide further details on our recent experiments which confirmed the emf induced by domain-wall dynamics.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.82.054410
