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arXiv · 2509.03031

Observation of surface superconductivity in bulk polycrystalline MoS2 induced by electric double-layer doping

Yoshihiro Shimazu·Tomonori Miyatake·Kento Ueno·Masatomo Uehara
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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.

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Yoshihiro Shimazu, Tomonori Miyatake, Kento Ueno, Masatomo Uehara. 2025-09-03. Observation of surface superconductivity in bulk polycrystalline MoS2 induced by electric double-layer doping. https://doi.org/10.35848/1347-4065%2Fadf424

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