He, Liang and Xiu, Faxian and Teague, Marcus and Jiang, Wanjun and Fan, Yabin and Kou, Xufeng and Lang, Murong and Wang, Yong and Huang, Guan and Yeh, Nai-Chang and Wang, Kang L. (2012) Surface-Dominated Conduction in a 6 nm thick Bi_2Se_3 Thin Film. Nano Letters, 12 (3). pp. 1486-1490. ISSN 1530-6984. https://resolver.caltech.edu/CaltechAUTHORS:20120508-155021196
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Abstract
We report a direct observation of surface dominated conduction in an intrinsic Bi_2Se_3 thin film with a thickness of six quintuple layers grown on lattice-matched CdS (0001) substrates by molecular beam epitaxy. Shubnikov-de Haas oscillations from the topological surface states suggest that the Fermi level falls inside the bulk band gap and is 53 ± 5 meV above the Dirac point, which is in agreement with 70 ± 20 meV obtained from scanning tunneling spectroscopies. Our results demonstrate a great potential of producing genuine topological insulator devices using Dirac Fermions of the surface states, when the film thickness is pushed to nanometer range.
| Item Type: | Article | |||||||||
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| Additional Information: | © 2012 American Chemical Society. Received: December 1, 2011. Revised: February 1, 2012. Publication Date (Web): February 8, 2012. This work was in part supported by the Focus Center Research Program - Center on Functional Engineered Nano Architectonics (FENA) and DARPA. Y.W. acknowledges the support from the National Science Foundation of China (No.11174244). | |||||||||
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| Subject Keywords: | Intrinsic topological insulator; Bi_2Se_3; transport properties; surface states; quantum oscillations | |||||||||
| Issue or Number: | 3 | |||||||||
| Record Number: | CaltechAUTHORS:20120508-155021196 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20120508-155021196 | |||||||||
| Official Citation: | Surface-Dominated Conduction in a 6 nm thick Bi2Se3 Thin Film Liang He, Faxian Xiu, Xinxin Yu, Marcus Teague, Wanjun, Jiang, Yabin Fan, Xufeng Kou, Murong Lang, Yong Wang, Guan Huang, Nai-Chang Yeh, and Kang L. Wang Nano Letters 2012 12 (3), 1486-1490 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 31361 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Ruth Sustaita | |||||||||
| Deposited On: | 09 May 2012 16:59 | |||||||||
| Last Modified: | 09 Mar 2020 13:19 |
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