| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Electrical-Controlled Transport for Surface States in a Dirac Semimetal Quantum Wire |
| XIAO Xian-Bo1**, LIU Zheng-Fang2, HE Yang-Ming1, LI Hui-Li1, AI Guo-Ping1, DU Yan1 |
1School of Computer Science, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004
2School of Basic Science, East China Jiaotong University, Nanchang 330013
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| Cite this article: |
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XIAO Xian-Bo, LIU Zheng-Fang, HE Yang-Ming et al 2015 Chin. Phys. Lett. 32 127302 |
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Abstract The transport properties of a Dirac semimetal quantum wire with two side gates are theoretically studied by adopting the lattice Green function method. It is found that a residual conductance quantum contributed from the surface states can be switched on or off by tuning the electron energy or the side gates voltage. This ideal switching effect for the surface Dirac electron results from the transversal quantum confinement of the quantum wire in combination with the electrostatic potential induced by the side gates. These findings may provide useful guidance for designing all-electrical topological nanoelectronic devices.
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Received: 22 June 2015
Published: 05 January 2016
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| PACS: |
73.20.At
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(Surface states, band structure, electron density of states)
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73.21.Hb
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(Quantum wires)
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73.23.Ad
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(Ballistic transport)
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