Surface States of Bi2 Se3 Nanowires in the Presence of Perpendicular Magnetic Fields
SHI Li-Kun, LOU Wen-Kai**
State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
Abstract ：We study the surface states of Bi2 Se3 nanowires (NWs) in the presence of perpendicular magnetic fields. It is found that the minigap of Bi2 Se3 , arising from the quantized surface states around the circumference of NWs can be closed by perpendicular magnetic fields. With increasing magnetic fields, the Landau levels and edge states appear and localize at the center and edge of NWs, respectively. More interestingly, magnetic fields split the electron surface subbands with opposite tangential momenta, leading to specific edge states with low group velocity.
出版日期: 2014-05-26
:
73.20.At
(Surface states, band structure, electron density of states)
75.75.-c
(Magnetic properties of nanostructures)
73.21.Hb
(Quantum wires)
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2014, Vol. 31 
