Electronic structure of SrSn2As2 near the topological critical point

L. Y. Rong; J. Z. Ma; S. M. Nie; Z. P. Lin; Z. L. Li; B. B. Fu; L. Y. Kong; X. Z. Zhang; Y. B. Huang; H. M. Weng; T. Qian; H. Ding; R. Z. Tai

doi:10.1038/s41598-017-05386-x

Electronic structure of SrSn₂As₂ near the topological critical point

L. Y. Rong
, J. Z. Ma
, S. M. Nie
, Z. P. Lin
, Z. L. Li
, B. B. Fu
, L. Y. Kong
, X. Z. Zhang
, Y. B. Huang
, H. M. Weng
, T. Qian
, H. Ding
, R. Z. Tai

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

15 Citations (Scopus)

41 Downloads (CityUHK Scholars)

Abstract

Topological materials with exotic quantum properties are promising candidates for quantum spin electronics. Different classes of topological materials, including Weyl semimetal, topological superconductor, topological insulator and Axion insulator, etc., can be connected to each other via quantum phase transition. For example, it is believed that a trivial band insulator can be twisted into topological phase by increasing spin-orbital coupling or changing the parameters of crystal lattice. With the results of LDA calculation and measurement by angle-resolved photoemission spectroscopy (ARPES), we demonstrate in this work that the electronic structure of SrSn₂As₂ single crystal has the texture of band inversion near the critical point. The results indicate the possibility of realizing topological quantum phase transition in SrSn₂As₂ single crystal and obtaining different exotic quantum states.

Original language	English
Article number	6133
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-05386-x
Publication status	Published - 1 Dec 2017
Externally published	Yes

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title = "Electronic structure of SrSn2As2 near the topological critical point",

abstract = "Topological materials with exotic quantum properties are promising candidates for quantum spin electronics. Different classes of topological materials, including Weyl semimetal, topological superconductor, topological insulator and Axion insulator, etc., can be connected to each other via quantum phase transition. For example, it is believed that a trivial band insulator can be twisted into topological phase by increasing spin-orbital coupling or changing the parameters of crystal lattice. With the results of LDA calculation and measurement by angle-resolved photoemission spectroscopy (ARPES), we demonstrate in this work that the electronic structure of SrSn2As2 single crystal has the texture of band inversion near the critical point. The results indicate the possibility of realizing topological quantum phase transition in SrSn2As2 single crystal and obtaining different exotic quantum states.",

author = "Rong, \{L. Y.\} and Ma, \{J. Z.\} and Nie, \{S. M.\} and Lin, \{Z. P.\} and Li, \{Z. L.\} and Fu, \{B. B.\} and Kong, \{L. Y.\} and Zhang, \{X. Z.\} and Huang, \{Y. B.\} and Weng, \{H. M.\} and T. Qian and H. Ding and Tai, \{R. Z.\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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doi = "10.1038/s41598-017-05386-x",

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TY - JOUR

T1 - Electronic structure of SrSn2As2 near the topological critical point

AU - Rong, L. Y.

AU - Ma, J. Z.

AU - Nie, S. M.

AU - Lin, Z. P.

AU - Li, Z. L.

AU - Fu, B. B.

AU - Kong, L. Y.

AU - Zhang, X. Z.

AU - Huang, Y. B.

AU - Weng, H. M.

AU - Qian, T.

AU - Ding, H.

AU - Tai, R. Z.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Topological materials with exotic quantum properties are promising candidates for quantum spin electronics. Different classes of topological materials, including Weyl semimetal, topological superconductor, topological insulator and Axion insulator, etc., can be connected to each other via quantum phase transition. For example, it is believed that a trivial band insulator can be twisted into topological phase by increasing spin-orbital coupling or changing the parameters of crystal lattice. With the results of LDA calculation and measurement by angle-resolved photoemission spectroscopy (ARPES), we demonstrate in this work that the electronic structure of SrSn2As2 single crystal has the texture of band inversion near the critical point. The results indicate the possibility of realizing topological quantum phase transition in SrSn2As2 single crystal and obtaining different exotic quantum states.

AB - Topological materials with exotic quantum properties are promising candidates for quantum spin electronics. Different classes of topological materials, including Weyl semimetal, topological superconductor, topological insulator and Axion insulator, etc., can be connected to each other via quantum phase transition. For example, it is believed that a trivial band insulator can be twisted into topological phase by increasing spin-orbital coupling or changing the parameters of crystal lattice. With the results of LDA calculation and measurement by angle-resolved photoemission spectroscopy (ARPES), we demonstrate in this work that the electronic structure of SrSn2As2 single crystal has the texture of band inversion near the critical point. The results indicate the possibility of realizing topological quantum phase transition in SrSn2As2 single crystal and obtaining different exotic quantum states.

UR - https://www.scopus.com/pages/publications/85025626207

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DO - 10.1038/s41598-017-05386-x

M3 - RGC 21 - Publication in refereed journal

C2 - 28733663

SN - 2045-2322

VL - 7

JO - Scientific Reports

JF - Scientific Reports

IS - 1

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