Faculty Publications
Spin-Orbit Interaction Effect in the Electronic Structure of Bi2Te3 Observed by Angle-Resolved Photoemission Spectroscopy
Document Type
Article
Journal/Book/Conference Title
EPL
Volume
81
Issue
5
Abstract
The electronic structure of p-type doped Bi2Te3 is studied by angle-resolved photoemission spectroscopy (ARPES) to experimentally confirm the mechanism responsible for the high thermoelectric figure of merit. Our ARPES study shows that the band edges are located off the Γ-Z line in the Brillouin zone, which provides direct observation that the spin-orbit interaction is a key factor to understand the electronic structure and the corresponding thermoelectric properties of Bi2Te3. A successive time-dependent ARPES measurement also reveals that the electron-like bands crossing EF near the -point are formed in an hour after cleaving the crystals. We interpret these as surface states induced by surface band bending, possibly due to quintuple inter-layer distance change of Bi 2Te3. © Europhysics Letters Association.
Department
Department of Physics
Original Publication Date
3-1-2008
DOI of published version
10.1209/0295-5075/81/57006
Recommended Citation
Kidd, Timothy E.; Noh, H. J.; Koh, H.; Oh, S. J.; Park, J. H.; Kim, H. D.; Rameau, J. D.; Valla, T.; Johnson, P. D.; Hu, Y.; and Li, Q., "Spin-Orbit Interaction Effect in the Electronic Structure of Bi2Te3 Observed by Angle-Resolved Photoemission Spectroscopy" (2008). Faculty Publications. 6436.
https://scholarworks.uni.edu/facpub/6436
