论文标题
较高的超导过渡温度t $ _c $和$α^2f（ω）$的t $ _c $的功能导数
The higher superconducting transition temperature T$_c$ and the functional derivative of T$_c$ with $α^2F(ω)$ for electron-phonon superconductors
论文作者
论文摘要
这项工作介绍了超导过渡温度t $ _c $的功能衍生物，相对于电子 - 偶联功能$α^2f（ω）$ [$Δt_T_C/δα^2 $ f（$ f（$ω$）]和$α^2f（ω）测量高-T $ _C $（155-225 GPA）。计算是在Migdal-Eliashberg理论的框架中完成的。我们发现了该电子 - phonon超导体，最大值$ΔT_C/δα^2 $ f（$ω$）和$α^2F（ω）$与较高的t $ _C $之间的相关性。我们通过分析文献中可用的数据来证实这种行为，这表明其在这种类型的超导体中的有效性。观察到的相关性可以被视为一种理论工具，在电子 - 音波超导体中，可以定性地描述与最高t $ _c $的近距离，并确定最佳的物理条件（压力，合金或掺杂浓度），从而导致超导体达到最高t $ _c $。
This work presents an analysis of the functional derivative of the superconducting transition temperature T$_c$ with respect to the electron-phonon coupling function $α^2F(ω)$ [$δT_c/δα^2$F($ω$)] and $α^2F(ω)$ spectrum of H$_3$S ($Im\bar3m$), in the pressure range where the high-T$_c$ was measured (155-225 GPa). The calculations are done in the framework of the Migdal-Eliashberg theory. We find for this electron-phonon superconductor, a correlation between the maximums of $δT_c/δα^2$F($ω$) and $α^2F(ω)$ with its higher T$_c$. We corroborate this behavior in other electron-phonon superconductors by analyzing data available in the literature, which suggests its validity in this type of superconductors. The correlation observed could be considered as a theoretical tool that in an electron-phonon superconductor, allows describing qualitatively the proximity to its highest T$_c$, and determining the optimal physical conditions (pressure, alloying or doping concentration) that lead to the superconductor reaching its highest T$_c$ possible.
