skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Gate-induced superconductivity in a monolayer topological insulator

Abstract

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.


Citation Formats

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., 2018. 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.. Thu . "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 = {Thu Oct 25 00:00:00 EDT 2018},
month = {Thu Oct 25 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1126/science.aar4426

Save / Share:

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