Adam, S.
, Hwang, E.
and Das, S.
(2012),
Two-dimensional transport and screening in topological insulator surface states, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910440
(Accessed October 6, 2024)
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Two-dimensional transport and screening in topological insulator surface states
Published
Author(s)
, Euyheon Hwang, Sankar Das Sarma
Abstract
We study the surface states of Bi2Se3 close to the topologically protected crossing point. Close to charge neutrality, local fluctuations in carrier density result in electron and hole puddles that dominate the electronic properties of these materials. By calculating the polarizability of the surface state using the random phase approximation, and determining the characteristics of puddles using the self-consistent approximation, we find band asymmetry plays a crucial role determining experimentally measured quantities including the conductivity and the puddle autocorrelation length.Citation
Physical Review B
Volume
85
Issue
23
Pub Type
Journals
Download Paper
Keywords
Topological insulators, conductivity
Citation
Issues
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Created June 6, 2012, Updated February 19, 2017