| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Topological Invariants of Metals and the Related Physical Effects |
| ZHOU Jian-Hui1**, JIANG Hua2, NIU Qian2,3, SHI Jun-Ren2 |
1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190
2International Center for Quantum Materials, Peking University, Beijing 100871
3Department of Physics, The University of Texas, Austin, Texas 78712-0264, USA
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| Cite this article: |
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ZHOU Jian-Hui, JIANG Hua, NIU Qian et al 2013 Chin. Phys. Lett. 30 027101 |
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Abstract The total reciprocal space magnetic flux threading through a closed Fermi surface is a topological invariant for a three-dimensional metal. For a Weyl metal, the invariant is nonzero for each of its Fermi surfaces. We show that such an invariant can be related to the magneto-valley-transport effect, in which an external magnetic field can induce a valley current. We further show that a strain field can drive an electric current, and that the effect is dictated by a second-class Chern invariant. These connections open the pathway to observe the hidden topological invariants in metallic systems.
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Received: 05 November 2012
Published: 02 March 2013
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| PACS: |
71.10.Ay
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(Fermi-liquid theory and other phenomenological models)
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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72.10.Bg
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(General formulation of transport theory)
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