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Title: Experimental Observation of Dirac-like Surface States and Topological Phase Transition in Pb 1 - x Sn x Te ( 111 ) Films

Abstract

The surface of a topological crystalline insulator (TCI) carries an even number of Dirac cones protected by crystalline symmetry. We epitaxially grew here high-quality $${\mathrm{Pb}}_{1{-}x}{\mathrm{Sn}}_{x}\mathrm{Te}(111)$$ films and investigated the TCI phase by in situ angle-resolved photoemission spectroscopy. $${\mathrm{Pb}}_{1{-}x}{\mathrm{Sn}}_{x}\mathrm{Te}(111)$$ films undergo a topological phase transition from a trivial insulator to TCI via increasing the Sn/Pb ratio, accompanied by a crossover from $$n$$-type to $$p$$-type doping. In addition, a hybridization gap is opened in the surface states when the thickness of the film is reduced to the two-dimensional limit. The work demonstrates an approach to manipulating the topological properties of TCI, which is of importance for future fundamental research and applications based on TCI.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [2];  [2];  [2];  [2];  [4];  [2];  [2];  [2]
+ Show Author Affiliations
  1. Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics. Dept. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China); Chinese Academy of Sciences (CAS), Shenyang (China). Shenyang National Lab. for Materials Science. Inst. of Metal Research
  2. Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics. Dept. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
  3. Chinese Academy of Sciences (CAS), Shenyang (China). Shenyang National Lab. for Materials Science. Inst. of Metal Research
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Tsinghua Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology (MOST) (China)
OSTI Identifier:
1505712
Grant/Contract Number:  
SC0010526; DMR-1231319; 11025419; 11074139; 51331006; 2011CB921901; 2011CB921904; 2011CB606405
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 112; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Yan, Chenhui, Liu, Junwei, Zang, Yunyi, Wang, Jianfeng, Wang, Zhenyu, Wang, Peng, Zhang, Zhi-Dong, Wang, Lili, Ma, Xucun, Ji, Shuaihua, He, Ke, Fu, Liang, Duan, Wenhui, Xue, Qi-Kun, and Chen, Xi. Experimental Observation of Dirac-like Surface States and Topological Phase Transition in Pb1-xSnxTe(111) Films. United States: N. p., 2014. Web. doi:10.1103/physrevlett.112.186801.
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Yan, Chenhui, Liu, Junwei, Zang, Yunyi, Wang, Jianfeng, Wang, Zhenyu, Wang, Peng, Zhang, Zhi-Dong, Wang, Lili, Ma, Xucun, Ji, Shuaihua, He, Ke, Fu, Liang, Duan, Wenhui, Xue, Qi-Kun, & Chen, Xi. Experimental Observation of Dirac-like Surface States and Topological Phase Transition in Pb1-xSnxTe(111) Films. United States. https://doi.org/10.1103/physrevlett.112.186801
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Yan, Chenhui, Liu, Junwei, Zang, Yunyi, Wang, Jianfeng, Wang, Zhenyu, Wang, Peng, Zhang, Zhi-Dong, Wang, Lili, Ma, Xucun, Ji, Shuaihua, He, Ke, Fu, Liang, Duan, Wenhui, Xue, Qi-Kun, and Chen, Xi. Mon . "Experimental Observation of Dirac-like Surface States and Topological Phase Transition in Pb1-xSnxTe(111) Films". United States. https://doi.org/10.1103/physrevlett.112.186801. https://www.osti.gov/servlets/purl/1505712.
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@article{osti_1505712,
title = {Experimental Observation of Dirac-like Surface States and Topological Phase Transition in Pb1-xSnxTe(111) Films},
author = {Yan, Chenhui and Liu, Junwei and Zang, Yunyi and Wang, Jianfeng and Wang, Zhenyu and Wang, Peng and Zhang, Zhi-Dong and Wang, Lili and Ma, Xucun and Ji, Shuaihua and He, Ke and Fu, Liang and Duan, Wenhui and Xue, Qi-Kun and Chen, Xi},
abstractNote = {The surface of a topological crystalline insulator (TCI) carries an even number of Dirac cones protected by crystalline symmetry. We epitaxially grew here high-quality ${\mathrm{Pb}}_{1{-}x}{\mathrm{Sn}}_{x}\mathrm{Te}(111)$ films and investigated the TCI phase by in situ angle-resolved photoemission spectroscopy. ${\mathrm{Pb}}_{1{-}x}{\mathrm{Sn}}_{x}\mathrm{Te}(111)$ films undergo a topological phase transition from a trivial insulator to TCI via increasing the Sn/Pb ratio, accompanied by a crossover from $n$-type to $p$-type doping. In addition, a hybridization gap is opened in the surface states when the thickness of the film is reduced to the two-dimensional limit. The work demonstrates an approach to manipulating the topological properties of TCI, which is of importance for future fundamental research and applications based on TCI.},
doi = {10.1103/physrevlett.112.186801},
journal = {Physical Review Letters},
number = 18,
volume = 112,
place = {United States},
year = {Mon May 05 00:00:00 EDT 2014},
month = {Mon May 05 00:00:00 EDT 2014}
}
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https://doi.org/10.1103/physrevlett.112.186801
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    Works referencing / citing this record:

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