Electrically tunable low-density superconductivity in a monolayer topological insulator
Abstract
Superconductors with a topologically nontrivial band structure have been predicted to exhibit exotic properties. However, such materials are few and far between. Now, two groups show that the monolayer of the material tungsten ditelluride (WTe 2 )—already known to be a two-dimensional topological insulator—can also go superconducting. Fatemi et al. and Sajadi et al. varied the carrier density in the monolayer by applying a gate voltage and observed a transition from a topological to a superconducting phase. The findings may lead to the fabrication of devices in which local gating enables topological and superconducting phases to exist in the same material.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 23, 2018
- Source ID
- 10.1126/science.aar4642
Entities
People
- Cao Yuan
- Kenji Watanabe
- Landry Bretheau
- Pablo Jarillo-Herrero
- Quinn D. Gibson
- Robert Cava
- Sanfeng Wu
- Takashi Taniguchi
- Valla Fatemi
Organizations
- Air Force Office of Scientific Research
- Gordon and Betty Moore Foundation
- Massachusetts Institute of Technology
- National Institute for Materials Science
- National Science Foundation
- Princeton University
- United States Department of Energy
- University of Liverpool
- École polytechnique