量化近期发现的高压缩超导体中的非绝热强度常数
Quantifying the nonadiabaticity strength constant in recently discovered highly-compressed superconductors
AI总结：
本研究通过分析多种近期发现的高压超导体的实验数据，量化其非绝热强度常数$T_θ/T_F$，发现不同材料的该常数分别与A15超导体或$H_3S$、$LaH_{10}$处于相近范围。
AI中文摘要：
自Drozdov等人（Nature 2015, 525, 73）在高压缩硫化氢中发现超导转变温度$T_c$=203 K的超导态以来，高压氢化物中的超导性已成为探索超导转变温度$T_c$基本上限的主要方向。截至目前，已发现数十种高温多氢化物超导体。此外，近期有报道称，高压缩钛和钪表现出创纪录的高$T_c$（最高达36 K），这一数值远超常压金属超导体中$T_c$最高的铌的9.2 K。本文分析了近期发现的高压超导体（在各自类别中具有高转变温度）的实验数据，包括单质钛（Zhang等人，Nature Communications 2022；Liu等人，Phys. Rev. B 2022）、$TaH_3$（He等人，Chinese Phys. Lett. 2023）、$LaBeH_8$（Song等人，Phys. Rev. Lett. 2023）以及黑磷（Li等人，Proc. Natl. Acad. Sci. 2018）和紫磷（Wu等人，arXiv 2023），以揭示这些超导体中的非绝热强度常数$T_θ/T_F$（其中$T_θ$为德拜温度，$T_F$为费米温度）。分析表明，δ相钛和黑磷的$T_θ/T_F$与A15超导体中的对应数值几乎一致，而所研究的氢化物和紫磷的该常数与$H_3S$和$LaH_{10}$的数值处于同一范围。
英文摘要：
Superconductivity in highly-pressurized hydrides became primary direction for the exploration of fundamental upper limit for the superconducting transition temperature, Tc, after Drozdov et al (Nature 2015, 525, 73) discovered superconducting state with $T_c=203 K$ in highly-compressed sulphur hydride. To date several dozens of high-temperature superconducting polyhydrides have been discovered. In addition, recently, it was reported that highly-compressed titanium and scandium exhibit record-high $T_c$ (up to 36 K), which is by manifold exceeded $T_c=9.2 K$ of niobium, which is the record high-$T_c$ ambient pressure metallic superconductor. Here we analysed experimental data on for recently discovered high-pressure superconductors (which exhibit high transition temperatures within their classes): elemental titanium (Zhang et al, Nature Communications 2022; Liu et al, Phys. Rev. B 2022), $TaH_3$ (He et al, Chinese Phys. Lett. 2023), $LaBeH_8$ (Song et al, Phys. Rev. Lett. 2023), and black (Li et al, Proc. Natl. Acad. Sci. 2018) and violet (Wu et al, arXiv 2023) phosphorous, to reveal the nonadiabaticity strength constant, $T_θ/T_F$ (where $T_θ$ is the Debye temperature, and $T_F$ the Fermi temperature) in these superconductors. The analysis showed that $δ$-phase of titanium and black phosphorous exhibit the $T_θ/T_F$ which are nearly identical to ones associated in A15 superconductors, while studied hydrides and violet phosphorous exhibit the constants in the same ballpark with $H_3S$ and $LaH_{10}$.
