Gate-induced superconductivity in a monolayer topological insulator
The layered semimetal tungsten ditelluride (WTe2) 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 ele...
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Published in | Science (American Association for the Advancement of Science) Vol. 362; no. 6417 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
AAAS
25.10.2018
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Subjects | |
Online Access | Get full text |
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Summary: | The layered semimetal tungsten ditelluride (WTe2) 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. |
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Bibliography: | USDOE Office of Science (SC) SC0002197; SC0018171 |
ISSN: | 0036-8075 1095-9203 |
DOI: | 10.1126/science.aar4426 |