论文标题
无序系统中的内在超导二极管效应
Intrinsic superconducting diode effect in disordered systems
论文作者
论文摘要
非肾脏运输现象吸引了现代冷凝物理物理学的广泛关注。在超导性领域，超导二极管效应（SDE）一直是中心主题之一。 SDE在固有机制方面的最新理论研究揭示了SDE与螺旋超导性之间的关系，为此，已经等待了实验性澄清。在这项工作中，我们建立了无序系统中固有SDE的微观理论。我们表明，在中等的杂质浓度下，非置换临界电流的符号逆转被抑制。但是，即使在中度无序的区域，SDE也显示出一个特征，表明了螺旋超导性的变化。还发现，二极管质量因子$ r $通过疾病增加，在Rashba-Zeeman模型中达到20％。
Nonreciprocal transport phenomena have attracted much attention in modern condensed matter physics. In the field of superconductivity, the superconducting diode effect (SDE) has been one of the central topics. Recent theoretical studies for the SDE in intrinsic mechanism revealed the relation between the SDE and helical superconductivity, for which experimental clarification has been awaited. In this work, we establish a microscopic theory of the intrinsic SDE in disordered systems. We show that the sign reversal of the nonreciprocal critical current is suppressed under moderate impurity concentrations. However, even in the moderately disordered region, the SDE shows a feature signaling the change in the nature of helical superconductivity. It is also found that the diode quality factor $r$ is increased by disorders and reaches 20% in the Rashba-Zeeman model.
