论文标题
由于带不对称而引起的接近诱导的平衡超流量和完美的超导二极管效应
Proximity-induced equilibrium supercurrent and perfect superconducting diode effect due to band asymmetry
论文作者
论文摘要
从理论上讲，我们在金属中通过其能量分散剂打破了时间反转和反转对称性的金属中接近性诱导的常规超导性的后果。我们发现在孤立的超导体中不可能的行为，例如平衡超流动，显然违反了无定理，并且在适当的拓扑缺陷下，对电荷的不掩盖，让人联想到手性异常。预计在正常状态下的螺旋电磁场可以训练超细电流。值得注意的是，如果条带不对称超过了适当单位的母体超导体的临界电流，我们会预测具有二极管系数统一的完美超导二极管效应。我们提出了诸如Uni $ _ {4} $ B之类的环形金属，并以方向标量旋转手性顺序作为潜在平台。
We theoretically investigate the consequences of proximity-induced conventional superconductivity in metals that break time-reversal and inversion symmetries through their energy dispersion. We discover behaviors impossible in an isolated superconductor such as an equilibrium supercurrent that apparently violates a no-go theorem and, at suitable topological defects, non-conservation of electric charge reminiscent of the chiral anomaly. The equilibrium supercurrent is expected to be trainable by a helical electromagnetic field in the normal state. Remarkably, if the band asymmetry exceeds the critical current of the parent superconductor in appropriate units, we predict a perfect superconducting diode effect with diode coefficient unity. We propose toroidal metals such as UNi$_{4}$B and metals with directional scalar spin chiral order as potential platforms.
