NDLI: Robustness of topological order and formation of quantum well states in topological insulators exposed to ambient environment

Content Provider	PubMed Central
Author	Chen, Chaoyu He, Shaolong Weng, Hongming Zhang, Wentao Zhao, Lin Liu, Haiyun Jia, Xiaowen Mou, Daixiang Liu, Shanyu He, Junfeng Peng, Yingying Feng, Ya Xie, Zhuojin Liu, Guodong Dong, Xiaoli Zhang, Jun Wang, Xiaoyang Peng, Qinjun Wang, Zhimin Zhang, Shenjin Yang, Feng Chen, Chuangtian Xu, Zuyan Dai, Xi Fang, Zhong Zhou, X. J.
Abstract	The physical property investigation (like transport measurements) and ultimate application of the topological insulators usually involve surfaces that are exposed to ambient environment (1 atm and room temperature). One critical issue is how the topological surface state will behave under such ambient conditions. We report high resolution angle-resolved photoemission measurements to directly probe the surface state of the prototypical topological insulators, Bi2Se3 and Bi2Te3, upon exposing to various environments. We find that the topological order is robust even when the surface is exposed to air at room temperature. However, the surface state is strongly modified after such an exposure. Particularly, we have observed the formation of two-dimensional quantum well states near the exposed surface of the topological insulators. These findings provide key information in understanding the surface properties of the topological insulators under ambient environment and in engineering the topological surface state for applications.
Related Links	http://dx.doi.org/10.1073/pnas.1115555109
Ending Page	3698
Page Count	5
Starting Page	3694
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	10
Volume Number	109
Language	English
Publisher	National Academy of Sciences
Publisher Date	2012-03-06
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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