Electrically tunable low-density superconductivity in a monolayer topological insulator
Author(s)Fatemi, Valla; Wu, Sanfeng; Cao, Yuan; Bretheau, Landry; Gibson, Quinn D.; Watanabe, Kenji; Taniguchi, Takashi; Cava, Robert J.; Jarillo-Herrero, Pablo; ... Show more Show less
MetadataShow full item record
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 (WTe2). 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 Tc up to ∼1 kelvin. Our results establish monolayer WTe2 as a material platform for engineering nanodevices that combine superconducting and topological phases of matter.
DepartmentMassachusetts Institute of Technology. Department of Physics
American Association for the Advancement of Science (AAAS)
Fatemi, Valla, et al. “Electrically Tunable Low-Density Superconductivity in a Monolayer Topological Insulator.” Science, 362, 6417 (November 2018): 926–929.
The following license files are associated with this item: