Topological Hall effect and Berry phase in magnetic nanostructures
We discuss the anomalous Hall effect in a two-dimensional electron gas subject to a spatially varying magnetization. This topological Hall effect does not require any spin-orbit coupling and arises solely from Berry phase acquired by an electron moving in a smoothly varying magnetization. We propose...
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| Published in | Physical review letters Vol. 93; no. 9; p. 096806 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
27.08.2004
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| Online Access | Get more information |
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| Summary: | We discuss the anomalous Hall effect in a two-dimensional electron gas subject to a spatially varying magnetization. This topological Hall effect does not require any spin-orbit coupling and arises solely from Berry phase acquired by an electron moving in a smoothly varying magnetization. We propose an experiment with a structure containing 2D electrons or holes of diluted magnetic semiconductor subject to the stray field of a lattice of magnetic nanocylinders. The striking behavior predicted for such a system (of which all relevant parameters are well known) allows one to observe unambiguously the topological Hall effect and to distinguish it from other mechanisms. |
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| ISSN: | 0031-9007 |
| DOI: | 10.1103/physrevlett.93.096806 |