Topological electromotive force from domain-wall dynamics in a ferromagnet
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 doe...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/60844 |
| _version_ | 1811069606179110912 |
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| author | Yang, Shengyuan A. Beach, Geoffrey Stephen Knutson, Carl Xiao, Di Zhang, Zhenyu Tsoi, Maxim Niu, Qian MacDonald, Allan H. Erskine, James L. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Yang, Shengyuan A. Beach, Geoffrey Stephen Knutson, Carl Xiao, Di Zhang, Zhenyu Tsoi, Maxim Niu, Qian MacDonald, Allan H. Erskine, James L. |
| author_sort | Yang, Shengyuan A. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T08:13:02Z |
| format | Article |
| id | mit-1721.1/60844 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:13:02Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/608442022-09-23T11:41:11Z Topological electromotive force from domain-wall dynamics in a ferromagnet Yang, Shengyuan A. Beach, Geoffrey Stephen Knutson, Carl Xiao, Di Zhang, Zhenyu Tsoi, Maxim Niu, Qian MacDonald, Allan H. Erskine, James L. Massachusetts Institute of Technology. Department of Materials Science and Engineering Beach, Geoffrey Stephen Beach, Geoffrey Stephen 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. National Science Foundation (U.S.) (Grant No. DMR-0906025) National Science Foundation (U.S.) (Grant No. DMR-0903812) Robert A. Welch Foundation United States. Dept. of Energy. Division of Materials Sciences and Engineering United States. Dept. of Energy (Grant No. DEFG03-02ER45958) 2011-01-26T14:39:00Z 2011-01-26T14:39:00Z 2010-08 2010-07 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/60844 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 en_US http://dx.doi.org/10.1103/PhysRevB.82.054410 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Yang, Shengyuan A. Beach, Geoffrey Stephen Knutson, Carl Xiao, Di Zhang, Zhenyu Tsoi, Maxim Niu, Qian MacDonald, Allan H. Erskine, James L. Topological electromotive force from domain-wall dynamics in a ferromagnet |
| title | Topological electromotive force from domain-wall dynamics in a ferromagnet |
| title_full | Topological electromotive force from domain-wall dynamics in a ferromagnet |
| title_fullStr | Topological electromotive force from domain-wall dynamics in a ferromagnet |
| title_full_unstemmed | Topological electromotive force from domain-wall dynamics in a ferromagnet |
| title_short | Topological electromotive force from domain-wall dynamics in a ferromagnet |
| title_sort | topological electromotive force from domain wall dynamics in a ferromagnet |
| url | http://hdl.handle.net/1721.1/60844 |
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