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Title: Gate-induced superconductivity in a monolayer topological insulator

The layered semimetal tungsten ditelluride (WTe 2 ) has recently been found to be a two-dimensional topological insulator (2D TI) when thinned down to a single monolayer, with conducting helical edge channels. We found that intrinsic superconductivity can be induced in this monolayer 2D TI by mild electrostatic doping at temperatures below 1 kelvin. The 2D TI–superconductor transition can be driven by applying a small gate voltage. This discovery offers possibilities for gate-controlled devices combining superconductivity and nontrivial topological properties, and could provide a basis for quantum information schemes based on topological protection.
Authors:
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Publication Date:
Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 362 Journal Issue: 6417; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
OSTI Identifier:
1483111

Sajadi, Ebrahim, Palomaki, Tauno, Fei, Zaiyao, Zhao, Wenjin, Bement, Philip, Olsen, Christian, Luescher, Silvia, Xu, Xiaodong, Folk, Joshua A., and Cobden, David H.. Gate-induced superconductivity in a monolayer topological insulator. United States: N. p., Web. doi:10.1126/science.aar4426.
Sajadi, Ebrahim, Palomaki, Tauno, Fei, Zaiyao, Zhao, Wenjin, Bement, Philip, Olsen, Christian, Luescher, Silvia, Xu, Xiaodong, Folk, Joshua A., & Cobden, David H.. Gate-induced superconductivity in a monolayer topological insulator. United States. doi:10.1126/science.aar4426.
Sajadi, Ebrahim, Palomaki, Tauno, Fei, Zaiyao, Zhao, Wenjin, Bement, Philip, Olsen, Christian, Luescher, Silvia, Xu, Xiaodong, Folk, Joshua A., and Cobden, David H.. 2018. "Gate-induced superconductivity in a monolayer topological insulator". United States. doi:10.1126/science.aar4426.
@article{osti_1483111,
title = {Gate-induced superconductivity in a monolayer topological insulator},
author = {Sajadi, Ebrahim and Palomaki, Tauno and Fei, Zaiyao and Zhao, Wenjin and Bement, Philip and Olsen, Christian and Luescher, Silvia and Xu, Xiaodong and Folk, Joshua A. and Cobden, David H.},
abstractNote = {The layered semimetal tungsten ditelluride (WTe 2 ) has recently been found to be a two-dimensional topological insulator (2D TI) when thinned down to a single monolayer, with conducting helical edge channels. We found that intrinsic superconductivity can be induced in this monolayer 2D TI by mild electrostatic doping at temperatures below 1 kelvin. The 2D TI–superconductor transition can be driven by applying a small gate voltage. This discovery offers possibilities for gate-controlled devices combining superconductivity and nontrivial topological properties, and could provide a basis for quantum information schemes based on topological protection.},
doi = {10.1126/science.aar4426},
journal = {Science},
number = 6417,
volume = 362,
place = {United States},
year = {2018},
month = {10}
}

Works referenced in this record:

Z2 Topological Order and the Quantum Spin Hall Effect
journal, September 2005

Quantum Spin Hall Insulator State in HgTe Quantum Wells
journal, November 2007

Colloquium: Topological insulators
journal, November 2010

Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
journal, December 2006
  • Bernevig, B. A.; Hughes, T. L.; Zhang, S.-C.
  • Science, Vol. 314, Issue 5806, p. 1757-1761
  • DOI: 10.1126/science.1133734

Electric-field-induced superconductivity in an insulator
journal, October 2008
  • Ueno, K.; Nakamura, S.; Shimotani, H.
  • Nature Materials, Vol. 7, Issue 11, p. 855-858
  • DOI: 10.1038/nmat2298