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Updated: Jun 2, 2026
11:07
Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Published on: August 15, 2015
Phase diagram of electrostatically doped SrTiO3
Yeonbae Lee1, Colin Clement, Jack Hellerstedt
1School of Physics and Astronomy, University of Minnesota, 116 Church St. SE, Minneapolis, Minnesota 55455, USA.
Physical Review Letters
|April 27, 2011
Summary
Electrostatic doping of strontium titanate (SrTiO3) with an ionic liquid revealed a conductor-insulator transition, anomalous Hall effect indicating magnetic ordering, and superconductivity with increasing carrier concentration.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Chemistry
Background:
- Strontium titanate (SrTiO3) is an insulating perovskite oxide.
- Electric double-layer transistors (EDLTs) enable electrostatic doping of materials.
Purpose of the Study:
- To investigate the effects of electrostatic doping on insulating SrTiO3 single crystals.
- To explore the phase transitions induced by varying carrier concentration and temperature.
Main Methods:
- Utilized electric double-layer transistor configurations with ionic liquid gate dielectrics.
- Performed doping experiments over broad ranges of temperature and carrier concentration.
Main Results:
- Observed a carrier-density dependent conductor-insulator transition.
- Detected a regime of the anomalous Hall effect, suggesting magnetic ordering.
- Achieved superconductivity at high carrier concentrations.
Conclusions:
- High carrier concentrations in SrTiO3 can induce a rich phase diagram including magnetic order and superconductivity.
- The interplay between magnetic ordering and superconductivity may be linked to quantum critical phenomena.
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