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Surface-Dominated Conduction in a 6 nm thick Bi_2Se_3 Thin Film

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.

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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
Related URLs:
URLURL TypeDescription DOIArticle
Wang, Yong0000-0001-7547-1542
Yeh, Nai-Chang0000-0002-1826-419X
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).
Funding AgencyGrant Number
Focus Center Research Program on Functional Engineered Nano Architectonics (FENA)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
National Science Foundation of China (NSFC)11174244
Subject Keywords:Intrinsic topological insulator; Bi_2Se_3; transport properties; surface states; quantum oscillations
Issue or Number:3
Record Number:CaltechAUTHORS:20120508-155021196
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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
Deposited By: Ruth Sustaita
Deposited On:09 May 2012 16:59
Last Modified:09 Mar 2020 13:19

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