论文标题
对非中心对称THCOC2的电子结构，声子和超导性的压力影响
Pressure effects on the electronic structure, phonons, and superconductivity of noncentrosymmetric ThCoC2
论文作者
论文摘要
从理论上，在压力范围0-20 GPA的压力范围内，在非中心对称超导体THCOC $ _2 $中研究了电子结构，声子，电子偶联和超导性。我们发现，在压力下，由自旋轨道耦合诱导的电子带分裂会增强。尽管晶体晶格的总体加强，但电子偶联常数$λ$随压力增加，从0 GPA的0.583增加到20 GPA时的0.652。如果使用各向同性的Eliashberg Electron-Phonon耦合理论来模拟对临界温度$ T_C $的影响，则$λ$的增加会导致$ T_C $从0 GPA的2.5〜K $从0 GPA升至4〜K，在20 GPA时。这表明，检查压力的效果为解决THCOC $ _2 $中的配对机制提供了机会。
The electronic structure, phonons, electron-phonon coupling, and superconductivity are theoretically studied in noncentrosymmetric superconductor ThCoC$_2$ as a function of pressure, in the pressure range 0 - 20 GPa. We found that the electronic band splitting induced by the spin-orbit coupling is enhanced under pressure. In spite of the overall stiffening of the crystal lattice, the electron-phonon coupling constant $λ$ increases with pressure, from 0.583 at 0 GPa to 0.652 at 20 GPa. If the isotropic Eliashberg electron-phonon coupling theory is used to simulate the effect on the critical temperature $T_c$, such an increase in $λ$ results in a substantial increase of $T_c$ from 2.5~K at 0 GPa to 4~K at 20 GPa. This shows that examining the effect of pressure offers a chance to resolve the pairing mechanism in ThCoC$_2$.
