Observation of surface superconductivity in bulk polycrystalline MoS2 induced by electric double-layer doping
Year: 2025
Type: article
Abstract: We report the observation of electric-field-induced superconductivity on the surface of bulk polycrystalline MoS2 using electric double-layer doping. A gate voltage applied in an ionic liquid environment systematically increased carrier density, leading to an insulator-to-metal transition and a sharp resistance drop at low temperatures, indicating superconductivity. The onset temperature of superconductivity strongly depended on carrier density inferred from conductance, showing a significant increase and eventual saturation. Unlike prior studies limited to single-crystalline MoS2, our results demonstrate that superconductivity can also be electrostatically induced in polycrystalline systems, broadening the scope for exploring gate-controlled superconductivity in a wider range of materials.
Authors: Yoshihiro Shimazu, Tomonori Miyatake, Kento Ueno, Masatomo Uehara
Institution: Yokohama National University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Award: G1239711523
OpenAlex ID: W4412625093