论文标题
无序超导体中的超流量流，具有破坏性散射的超导体：减少电流，动态电感和过热场
Superfluid flow in disordered superconductors with Dynes pair-breaking scattering: depairing current, kinetic inductance, and superheating field
论文作者
论文摘要
我们调查了Dynes成对散射率$γ$对狭窄的薄膜超导体中超流量流的影响，以及通过自我一致地解决所有温度$ t $的差异性限制的BCS理论的耦合的Maxwell和USADEL方程，以全部$γ$和所有Suppleflu Inmplu nomm nomm armeplud。我们在狭窄的薄膜中获得了流动电流密度$ j_d（γ，t）$以及依赖当前的非线性动力电感$ l_k（j_s，γ，t）$，并在半效率上效果的超级效果，并在半度性的超级委员会中分配了当前的分布，对超级效果的分布，对不合格的MEIS进行了分配。 $ j_d（γ，t）的分析表达式| _ {t = 0} $，$ l_k（j_s，γ，t）| _ {t = 0} $和$ h_ {sh}（γ，t）| _ {t = 0} $也被得出。该理论表明$ j_d $和$ h_ {sh} $可以通过减少$γ$来改善，并且$ l_k $可以通过偏置电流和$γ$的组合来调节。隧道光谱可以测试该理论，还可以深入了解如何通过材料处理来设计$γ$。该理论的含义对于改善各种超导量子设备的性能是有用的。
We investigate the effects of Dynes pair-breaking scattering rate $Γ$ on the superfluid flow in a narrow thin-film superconductor and a semi-infinite superconductor by self-consistently solving the coupled Maxwell and Usadel equations for the BCS theory in the diffusive limit for all temperature $T$, all $Γ$, and all superfluid momentum. We obtain the depairing current density $j_d(Γ, T)$ and the current-dependent nonlinear kinetic inductance $L_k(j_s, Γ, T)$ in a narrow thin-film and the superheating field $H_{sh}(Γ, T)$ and the current distribution in a semi-infinite superconductor, taking the nonlinear Meissner effect into account. The analytical expressions for $j_d(Γ,T)|_{T=0}$, $L_k(j_s, Γ, T)|_{T=0}$, and $H_{sh}(Γ, T)|_{T=0}$ are also derived. The theory suggests $j_d$ and $H_{sh}$ can be ameliorated by reducing $Γ$, and $L_k$ can be tuned by a combination of the bias current and $Γ$. Tunneling spectroscopy can test the theory and also give insight into how to engineer $Γ$ via materials processing. Implications of the theory would be useful to improve performances of various superconducting quantum devices.
