Surface States of Bi<sub>2</sub>Se<sub>3</sub> Nanowires in the Presence of Perpendicular Magnetic Fields

doi:10.1088/0256-307X/31/6/067304

Chin. Phys. Lett.

2014, Vol. 31

Issue (06): 067304 DOI: 10.1088/0256-307X/31/6/067304

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Surface States of Bi₂Se₃ 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

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SHI Li-Kun, LOU Wen-Kai 2014 Chin. Phys. Lett. 31 067304

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Abstract We study the surface states of Bi₂Se₃ nanowires (NWs) in the presence of perpendicular magnetic fields. It is found that the minigap of Bi₂Se₃, 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.

Published: 26 May 2014

PACS:	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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https://cpl.iphy.ac.cn/10.1088/0256-307X/31/6/067304 OR https://cpl.iphy.ac.cn/Y2014/V31/I06/067304

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