Related Experiment Video
Updated: Jun 10, 2025
04:51
Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
2.7K
Compressed Sr superconducting transition temperature up to 17.65 K.
Ya-Le Tao1, Qi-Jun Liu1, Dai-He Fan1
1Bond and Band Engineering Group, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, People's Republic of China. qijunliu@home.swjtu.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|October 21, 2024
Summary
High pressure enhances superconductivity in strontium (Sr) by influencing electron behavior and phonon interactions. This study reveals Sr
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Elemental superconductors are crucial for understanding high-temperature superconductivity mechanisms.
- Strontium (Sr) exhibits complex superconducting properties under high pressure.
Purpose of the Study:
- To investigate the phase transition sequence and superconducting properties of strontium under pressure using simulated calculations.
- To elucidate the relationship between electronic structure, phonon behavior, and superconductivity in Sr.
Main Methods:
- Computational simulations were employed to study phase transitions and superconducting properties.
- Analysis focused on the electronic band structure, Fermi surface, and electron-phonon coupling (EPC).
Main Results:
- The stability range of the Sr-IV phase (C2/c) was extended to 150 GPa.
- D-electrons significantly influence the Fermi surface in the Sr-IV phase, linked to Van Hove singularities (VHS).
- Superconducting transition temperature (Tc) in Sr increases with pressure due to phonon softening and strong coupling from VHS overlap with the Fermi level, reaching 17.65 K at 150 GPa with a strong EPC (λ=1.26).
Conclusions:
- The study provides new insights into the superconductivity of high-pressure strontium phases.
- Strong electron-phonon coupling, driven by d-electron interactions with phonons, is key to Sr's superconductivity under pressure.
- Findings offer theoretical guidance for exploring elemental superconductors.
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