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Updated: Jun 9, 2025
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
Published on: April 12, 2018
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Gate-Controlled Potassium Intercalation and Superconductivity in Molybdenum Disulfide.
Ricky Dwi Septianto1, Alec Paul Romagosa1,2, Yu Dong3
1RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Nano Letters
|October 21, 2024
Summary
Ionic gating enables potassium ion intercalation in MoS2, inducing structural changes and revealing distinct superconductivity. This method offers new insights into intercalated material properties and electrostatically induced superconductivity.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Intercalation of ions into layered materials creates novel phases.
- Ionic gating controls ion movement for intercalation and doping.
- In situ probing of ion diffusion and transport properties is advancing.
Purpose of the Study:
- To investigate potassium ion (K+) intercalation in single-crystal MoS2 using ionic gating.
- To construct a temperature-carrier density phase diagram for intercalated MoS2.
- To differentiate between electrostatically induced and intercalated superconductivity.
Main Methods:
- In situ resistivity measurements.
- In situ Raman spectroscopy.
- Potassium ion (K+) intercalation via ionic gating.
Main Results:
- Potassium ion intercalation induced a structural transition in MoS2.
- Anisotropic three-dimensional superconductivity and a potential charge density wave state were observed.
- Electrostatically induced superconductivity was shown to be distinct from intercalated superconductivity.
Conclusions:
- Ionic gating provides a comprehensive view of intercalated phases in layered materials.
- Potassium ion intercalation in MoS2 leads to unique electronic and structural properties.
- The study distinguishes between different mechanisms of superconductivity in MoS2.
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