Spin-orbit interaction effect in the electronic structure of Bi2Te3 observed by angle-resolved photoemission spectroscopy
SCIE
SCOPUS
- Title
- Spin-orbit interaction effect in the electronic structure of Bi2Te3 observed by angle-resolved photoemission spectroscopy
- Authors
- Noh, HJ; Koh, H; Oh, SJ; Park, JH; Kim, HD; Rameau, JD; Valla, T; Kidd, TE; Johnson, PD; Hu, Y; Li, Q
- Date Issued
- 2008-03
- Publisher
- EDP SCIENCES S A
- 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 Gamma-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 E-F near the (Gamma) under bar -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 Bi2Te3. Copyright (c) EPLA, 2008.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10169
- DOI
- 10.1209/0295-5075/81/57006
- ISSN
- 0295-5075
- Article Type
- Article
- Citation
- EPL, vol. 81, no. 5, 2008-03
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