Experimental Observation of Dirac-like Surface States and Topological Phase Transition in Pb[subscript 1-x]Sn[subscript x]Te(111) Films
Name
PhysRevLett.112.186801.pdf
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1.82 MB
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Checksum (MD5)
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Author(s)
Yan, Chenhui
Liu, Junwei
Zang, Yunyi
Wang, Jianfeng
Wang, Zhenyu
Wang, Peng
Zhang, Zhi-Dong
Wang, Lili
Ma, Xucun
Ji, Shuaihua
Date Issued
May 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Yan, Chenhui, Junwei Liu, Yunyi Zang, Jianfeng Wang, Zhenyu Wang, Peng Wang, Zhi-Dong Zhang, et al. “Experimental Observation of Dirac-Like Surface States and Topological Phase Transition in Pb[subscript 1-x]Sn[subscript x]Te(111) Films.” Physical Review Letters 112, no. 18 (May 2014). © 2014 American Physical Society
Version
Final published version
Abstract
The surface of a topological crystalline insulator (TCI) carries an even number of Dirac cones protected by crystalline symmetry. We epitaxially grew high-quality Pb[subscript 1−x]Sn[subscript x]Te(111) films and investigated the TCI phase by in situ angle-resolved photoemission spectroscopy. Pb[subscript 1−x]Sn[subscript x]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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.112.186801
