Related Experiment Video
Updated: Mar 24, 2026
04:51
Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
3.2K
Exotic s-wave superconductivity in alkali-doped fullerides
Yusuke Nomura1, Shiro Sakai, Massimo Capone
1Department of Applied Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Summary
Alkali-doped fullerides exhibit unconventional superconductivity, challenging the incompatibility of Mott physics and s-wave superconductivity. Ab initio calculations reveal electron-phonon and electron-electron interactions drive high-transition-temperature superconductivity.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Chemistry
Background:
- Alkali-doped fullerides (A3C60) present a unique phase diagram with superconductivity adjacent to Mott insulating states.
- This challenges conventional understanding of the incompatibility between Mott physics and phonon-mediated s-wave superconductivity.
Purpose of the Study:
- To review recent ab initio calculations on alkali-doped fullerides.
- To elucidate the mechanism behind unconventional high-transition-temperature (Tc) superconductivity in these materials.
Main Methods:
- Comprehensive ab initio calculations.
- Analysis of electron-phonon coupling and electron-electron interactions.
- Investigation of intramolecular interactions, including Coulomb and exchange interactions.
Main Results:
- Accurate reproduction of the experimental phase diagram of alkali-doped fullerides.
- Identification of an unusual interplay between electron-phonon and electron-electron interactions.
- Demonstration that strong electron correlations and Jahn-Teller phonons synergize to enable unconventional s-wave superconductivity.
Conclusions:
- Alkali-doped fullerides are a novel class of unconventional superconductors.
- High-Tc superconductivity arises from a unique synergy between phonons and Coulomb interactions.
- Electron correlations, while typically associated with Mott insulation, surprisingly facilitate superconductivity in this system.
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