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Updated: Aug 1, 2025
04:51
Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
2.8K
Superconductivity in Ce-based cage compounds
Suman Raj Panday1, Maxim Dzero1
1Department of Physics, Kent State University, Kent, OH 44242, United States of America.
Summary
Nodal superconductivity, driven by valence fluctuations, is the ground state in cerium compounds CeNi2Cd20 and CePd2Cd20. Hydrostatic pressure is proposed to enhance the superconducting transition temperature in these materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Cerium-based ternary compounds CeNi2Cd20 and CePd2Cd20 lack long-range order at millikelvin temperatures.
- Reduced super-exchange and Ruderman-Kittel-Kasuya-Yosida interactions suggest unconventional electronic ground states.
Purpose of the Study:
- Investigate the ground state of CeNi2Cd20 and CePd2Cd20.
- Propose methods to enhance superconducting properties.
Main Methods:
- Utilized an extended periodic Anderson lattice model.
- Incorporated long-range and local Coulomb interactions.
- Employed the slave-boson approach to study electron correlations.
Main Results:
- Nodal superconductivity mediated by valence fluctuations is identified as the ground state.
- Repulsive electron-electron interactions drive the emergence of d-wave superconductivity.
- Hydrostatic pressure is predicted to increase the superconducting transition critical temperature.
Conclusions:
- CeNi2Cd20 and CePd2Cd20 exhibit nodal superconductivity due to valence fluctuations.
- Applying hydrostatic pressure is a viable strategy to enhance superconductivity in these materials.
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