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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
Published on: April 12, 2018
Large electric field effect in electrolyte-gated manganites
Anoop Singh Dhoot1, Casey Israel, Xavier Moya
1Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Physical Review Letters
|April 28, 2009
Summary
Electrostatic doping in La0.8Ca0.2MnO3 transistors induces an insulating state with positive bias and enhances conductivity with negative bias. This study explores field-induced doping effects in advanced materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Chemistry
Background:
- La0.8Ca0.2MnO3 exhibits complex magnetic and electronic properties.
- Field-effect doping is a key technique for tuning material properties.
Purpose of the Study:
- To investigate electrostatic field-induced doping in La0.8Ca0.2MnO3 transistors.
- To understand the transition from metallic to insulating states via doping.
Main Methods:
- Utilized electrolyte-gated transistors with La0.8Ca0.2MnO3 as the active channel material.
- Applied varying positive and negative gate biases to induce doping.
Main Results:
- Positive gate bias induced electron doping, driving a transition from a ferromagnetic metal to an insulating state.
- The doped layer thickness varied with bias, reaching up to 5 nm.
- Negative gate voltages increased metallic conductivity by approximately 30%.
Conclusions:
- Electrostatic doping is an effective method to control the electronic ground state of La0.8Ca0.2MnO3.
- The observed transitions highlight the sensitivity of La0.8Ca0.2MnO3 to charge carrier concentration changes.
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