Gate-controlled surface conduction in Na-Doped Bi2Te3 topological insulator nanoplates

Wang, Yong, Xiu, Faxian, Cheng, Lina, He, Liang, Lang, Murong, Tang, Jianshi, Kou, Xufeng, Yu, Xinxin, Jiang, Xiaowei, Chen, Zhigang, Zou, Jin and Wang, Kang L. (2012) Gate-controlled surface conduction in Na-Doped Bi2Te3 topological insulator nanoplates. Nano Letters, 12 3: 1170-1175. doi:10.1021/nl202920p


Author Wang, Yong
Xiu, Faxian
Cheng, Lina
He, Liang
Lang, Murong
Tang, Jianshi
Kou, Xufeng
Yu, Xinxin
Jiang, Xiaowei
Chen, Zhigang
Zou, Jin
Wang, Kang L.
Title Gate-controlled surface conduction in Na-Doped Bi2Te3 topological insulator nanoplates
Formatted title
Gate-controlled surface conduction in Na-doped Bi2Te3 topological insulator nanoplates
Journal name Nano Letters   Check publisher's open access policy
ISSN 1530-6984
1530-6992
Publication date 2012-03-01
Sub-type Article (original research)
DOI 10.1021/nl202920p
Open Access Status Not Open Access
Volume 12
Issue 3
Start page 1170
End page 1175
Total pages 6
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
Exploring exciting and exotic physics, scientists are pursuing practical device applications for topological insulators. The Dirac-like surface states in topological insulators are protected by the time-reversal symmetry, which naturally forbids backscattering events during the carrier transport process, and therefore offers promising applications in dissipationless spintronic devices. Although considerable efforts have been devoted to controlling their surface conduction, limited work has been focused on tuning surface states and bulk carriers in Bi2Te3 nanostructures by external field. Here we report gate-tunable surface conduction in Na-doped Bi2Te3 topological insulator nanoplates. Significantly, by applying external gate voltages, such topological insulators can be tuned from p-type to n-type. Our results render a promise in finding novel topological insulators with enhanced surface states.
Keyword Topological insulator
Bismuth telluride
Sodium doping
Surface states
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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