Please use this identifier to cite or link to this item:
Title: Effective Hamiltonian for surface states of topological insulator nanotubes
Authors: Siu Z.B. 
Tan S.G. 
Jalil M.B.A. 
Issue Date: 2017
Citation: Siu Z.B., Tan S.G., Jalil M.B.A. (2017). Effective Hamiltonian for surface states of topological insulator nanotubes. Scientific Reports 7 : 45350. ScholarBank@NUS Repository.
Abstract: In this work we derive an effective Hamiltonian for the surface states of a hollow topological insulator (TI) nanotube with finite width walls. Unlike a solid TI cylinder, a TI nanotube possesses both an inner as well as outer surface on which the states localized at each surface are coupled together. The curvature along the circumference of the nanotube leads to a spatial variation of the spin orbit interaction field experienced by the charge carriers as well as an asymmetry between the inner and outer surfaces of the nanotube. Both of these features result in terms in the effective Hamiltonian for a TI nanotube absent in that of a flat TI thin film of the same thickness. We calculate the numerical values of the parameters for a Bi2Se3 nanotube as a function of the inner and outer radius, and show that the differing relative magnitudes between the parameters result in qualitatively differing behaviour for the eigenstates of tubes of different dimensions. © 2017 The Author(s).
Source Title: Scientific Reports
ISSN: 20452322
DOI: 10.1038/srep45350
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
10_1038_srep45350.pdf1.1 MBAdobe PDF




checked on May 13, 2022

Page view(s)

checked on May 12, 2022

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.