Chin. Phys. Lett.  2015, Vol. 32 Issue (5): 057501    DOI: 10.1088/0256-307X/32/5/057501
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Chiral Current in the Lattice Model of Weyl Semimetal
SUN Liang1,2, WAN Shao-Long1**
1Department of Modern Physics, University of Science and Technology of China, Hefei 230026
2National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
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SUN Liang, WAN Shao-Long 2015 Chin. Phys. Lett. 32 057501
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Abstract We demonstrate the existence of the chiral magnetic effect in a simple lattice model of Weyl semimetal, which is a hallmark of chiral anomaly in the Weyl semimetal, by calculating the anomalous charge current directly. We identify that the uniform external magnetic field can induce a non-dissipative charge current along its direction in Weyl semimetal, even in the absence of an external electric field if the right and left handed Weyl points are separated in energy, and that the anomalous current is proportional to the strength of the magnetic field and the energy separation with a universal coefficient e2/h2, which coincide with the ones predicted on the basis of the field theory treatment. Our results give the possibility to detect these nontrivial electrodynamic phenomena in real materials of Weyl semimetal.
Received: 07 January 2015      Published: 01 June 2015
PACS:  75.47.-m (Magnetotransport phenomena; materials for magnetotransport)  
  03.65.Vf (Phases: geometric; dynamic or topological)  
  73.43.-f (Quantum Hall effects)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/5/057501       OR      https://cpl.iphy.ac.cn/Y2015/V32/I5/057501
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SUN Liang
WAN Shao-Long
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