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Title: Electrically tunable low-density superconductivity in a monolayer topological insulator

Abstract

Turning on superconductivity in a topologically nontrivial insulator may provide a route to search for non-Abelian topological states. However, existing demonstrations of superconductor-insulator switches have involved only topologically trivial systems. Here we report reversible, in situ electrostatic on-off switching of superconductivity in the recently established quantum spin Hall insulator monolayer tungsten ditelluride (WTe 2 ). Fabricated into a van der Waals field-effect transistor, the monolayer’s ground state can be continuously gate-tuned from the topological insulating to the superconducting state, with critical temperatures T c up to ~1 kelvin. Our results establish monolayer WTe 2 as a material platform for engineering nanodevices that combine superconducting and topological phases of matter.


Citation Formats

Fatemi, Valla, Wu, Sanfeng, Cao, Yuan, Bretheau, Landry, Gibson, Quinn D., Watanabe, Kenji, Taniguchi, Takashi, Cava, Robert J., and Jarillo-Herrero, Pablo. Electrically tunable low-density superconductivity in a monolayer topological insulator. United States: N. p., 2018. Web. doi:10.1126/science.aar4642.
Fatemi, Valla, Wu, Sanfeng, Cao, Yuan, Bretheau, Landry, Gibson, Quinn D., Watanabe, Kenji, Taniguchi, Takashi, Cava, Robert J., & Jarillo-Herrero, Pablo. Electrically tunable low-density superconductivity in a monolayer topological insulator. United States. doi:10.1126/science.aar4642.
Fatemi, Valla, Wu, Sanfeng, Cao, Yuan, Bretheau, Landry, Gibson, Quinn D., Watanabe, Kenji, Taniguchi, Takashi, Cava, Robert J., and Jarillo-Herrero, Pablo. Thu . "Electrically tunable low-density superconductivity in a monolayer topological insulator". United States. doi:10.1126/science.aar4642.
@article{osti_1483110,
title = {Electrically tunable low-density superconductivity in a monolayer topological insulator},
author = {Fatemi, Valla and Wu, Sanfeng and Cao, Yuan and Bretheau, Landry and Gibson, Quinn D. and Watanabe, Kenji and Taniguchi, Takashi and Cava, Robert J. and Jarillo-Herrero, Pablo},
abstractNote = {Turning on superconductivity in a topologically nontrivial insulator may provide a route to search for non-Abelian topological states. However, existing demonstrations of superconductor-insulator switches have involved only topologically trivial systems. Here we report reversible, in situ electrostatic on-off switching of superconductivity in the recently established quantum spin Hall insulator monolayer tungsten ditelluride (WTe 2 ). Fabricated into a van der Waals field-effect transistor, the monolayer’s ground state can be continuously gate-tuned from the topological insulating to the superconducting state, with critical temperatures T c up to ~1 kelvin. Our results establish monolayer WTe 2 as a material platform for engineering nanodevices that combine superconducting and topological phases of matter.},
doi = {10.1126/science.aar4642},
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.aar4642

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Works referenced in this record:

Colloquium: Topological insulators
journal, November 2010


The influence of fluctuation pairing of electrons on the conductivity of normal metal
journal, February 1968