The coexistence of superconductivity and topological order in the Bi 2Se3 thin films

Mei Xiao Wang, Canhua Liu, Jin Peng Xu, Fang Yang, Lin Miao, Meng Yu Yao, C. L. Gao, Chenyi Shen, Xucun Ma, X. Chen, Zhu An Xu, Ying Liu, Shou Cheng Zhang, Dong Qian, Jin Feng Jia, Qi Kun Xue

Research output: Contribution to journalArticle

224 Citations (Scopus)

Abstract

Three-dimensional topological insulators (TIs) are characterized by their nontrivial surface states, in which electrons have their spin locked at a right angle to their momentum under the protection of time-reversal symmetry. The topologically ordered phase in TIs does not break any symmetry. The interplay between topological order and symmetry breaking, such as that observed in superconductivity, can lead to new quantum phenomena and devices. We fabricated a superconducting TI/superconductor heterostructure by growing dibismuth triselenide (Bi2Se3) thin films on superconductor niobium diselenide substrate. Using scanning tunneling microscopy and angle-resolved photoemission spectroscopy, we observed the superconducting gap at the Bi 2Se3 surface in the regime of Bi2Se3 film thickness where topological surface states form. This observation lays the groundwork for experimentally realizing Majorana fermions in condensed matter physics.

Original languageEnglish (US)
Pages (from-to)52-55
Number of pages4
JournalScience
Volume335
Issue number6077
DOIs
StatePublished - Apr 6 2012

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Scanning Tunnelling Microscopy
Niobium
Photoelectron Spectroscopy
Physics
Electrons
Equipment and Supplies
Superconductivity

All Science Journal Classification (ASJC) codes

  • General

Cite this

Wang, M. X., Liu, C., Xu, J. P., Yang, F., Miao, L., Yao, M. Y., ... Xue, Q. K. (2012). The coexistence of superconductivity and topological order in the Bi 2Se3 thin films. Science, 335(6077), 52-55. https://doi.org/10.1126/science.1216466
Wang, Mei Xiao ; Liu, Canhua ; Xu, Jin Peng ; Yang, Fang ; Miao, Lin ; Yao, Meng Yu ; Gao, C. L. ; Shen, Chenyi ; Ma, Xucun ; Chen, X. ; Xu, Zhu An ; Liu, Ying ; Zhang, Shou Cheng ; Qian, Dong ; Jia, Jin Feng ; Xue, Qi Kun. / The coexistence of superconductivity and topological order in the Bi 2Se3 thin films. In: Science. 2012 ; Vol. 335, No. 6077. pp. 52-55.
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abstract = "Three-dimensional topological insulators (TIs) are characterized by their nontrivial surface states, in which electrons have their spin locked at a right angle to their momentum under the protection of time-reversal symmetry. The topologically ordered phase in TIs does not break any symmetry. The interplay between topological order and symmetry breaking, such as that observed in superconductivity, can lead to new quantum phenomena and devices. We fabricated a superconducting TI/superconductor heterostructure by growing dibismuth triselenide (Bi2Se3) thin films on superconductor niobium diselenide substrate. Using scanning tunneling microscopy and angle-resolved photoemission spectroscopy, we observed the superconducting gap at the Bi 2Se3 surface in the regime of Bi2Se3 film thickness where topological surface states form. This observation lays the groundwork for experimentally realizing Majorana fermions in condensed matter physics.",
author = "Wang, {Mei Xiao} and Canhua Liu and Xu, {Jin Peng} and Fang Yang and Lin Miao and Yao, {Meng Yu} and Gao, {C. L.} and Chenyi Shen and Xucun Ma and X. Chen and Xu, {Zhu An} and Ying Liu and Zhang, {Shou Cheng} and Dong Qian and Jia, {Jin Feng} and Xue, {Qi Kun}",
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Wang, MX, Liu, C, Xu, JP, Yang, F, Miao, L, Yao, MY, Gao, CL, Shen, C, Ma, X, Chen, X, Xu, ZA, Liu, Y, Zhang, SC, Qian, D, Jia, JF & Xue, QK 2012, 'The coexistence of superconductivity and topological order in the Bi 2Se3 thin films', Science, vol. 335, no. 6077, pp. 52-55. https://doi.org/10.1126/science.1216466

The coexistence of superconductivity and topological order in the Bi 2Se3 thin films. / Wang, Mei Xiao; Liu, Canhua; Xu, Jin Peng; Yang, Fang; Miao, Lin; Yao, Meng Yu; Gao, C. L.; Shen, Chenyi; Ma, Xucun; Chen, X.; Xu, Zhu An; Liu, Ying; Zhang, Shou Cheng; Qian, Dong; Jia, Jin Feng; Xue, Qi Kun.

In: Science, Vol. 335, No. 6077, 06.04.2012, p. 52-55.

Research output: Contribution to journalArticle

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AU - Wang, Mei Xiao

AU - Liu, Canhua

AU - Xu, Jin Peng

AU - Yang, Fang

AU - Miao, Lin

AU - Yao, Meng Yu

AU - Gao, C. L.

AU - Shen, Chenyi

AU - Ma, Xucun

AU - Chen, X.

AU - Xu, Zhu An

AU - Liu, Ying

AU - Zhang, Shou Cheng

AU - Qian, Dong

AU - Jia, Jin Feng

AU - Xue, Qi Kun

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AB - Three-dimensional topological insulators (TIs) are characterized by their nontrivial surface states, in which electrons have their spin locked at a right angle to their momentum under the protection of time-reversal symmetry. The topologically ordered phase in TIs does not break any symmetry. The interplay between topological order and symmetry breaking, such as that observed in superconductivity, can lead to new quantum phenomena and devices. We fabricated a superconducting TI/superconductor heterostructure by growing dibismuth triselenide (Bi2Se3) thin films on superconductor niobium diselenide substrate. Using scanning tunneling microscopy and angle-resolved photoemission spectroscopy, we observed the superconducting gap at the Bi 2Se3 surface in the regime of Bi2Se3 film thickness where topological surface states form. This observation lays the groundwork for experimentally realizing Majorana fermions in condensed matter physics.

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