Wang, Jimin and Kurzendorfer, Alexander and Chen, Lin and Wang, Zhiwei and Ando, Yoichi and Xu, Yang and Miotkowski, Ireneusz and Chen, Yong P. and Weiss, Dieter (2021) Mobility spectrum analysis on three-dimensional topological insulator BiSbTeSe2. APPLIED PHYSICS LETTERS, 118 (25): 253107. ISSN 0003-6951, 1077-3118
Full text not available from this repository. (Request a copy)Abstract
We conducted mobility spectrum analysis on a high quality three dimensional topological insulator film of BiSbTeSe2 to extract mobility mu and carrier density n. Top and bottom gates were applied to tune the carrier density on top and bottom surfaces independently. At 1.5K, when the conduction is entirely dominated by the Dirac surface states, we always find two dominant conduction channels (top and bottom surfaces), with mu = 500 - 3000 cm(2)/(Vs) and n on the order of 1 0 12 c m - 2. However, at sufficiently high temperature ( T = 85 K), when the bulk contributes, a third channel with maximum mobility mu similar to 400cm(2)/(Vs) and n on the order of 1 0 11 - 1 0 13 c m - 2 opens. Our data show the feasibility of the method to analyze the different conduction channels in a topological insulator, being also promising for other similar material systems.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SURFACE-STATE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Sep 2022 07:37 |
| Last Modified: | 14 Sep 2022 07:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/47419 |
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