AI 中文总结
研究手性 Kagome 反铁磁体中，面外自旋倾斜或自旋轨道耦合产生的手性边缘态，通过晶格依赖边界终止使边缘光谱不对称，在约瑟夫森结中产生非互易特征，拓宽超导非互易性理解，为超导二极管器件提供新途径。
AI 中文摘要
非互易超导输运能够实现无耗散整流，已引起广泛关注，但其微观起源通常在体电子态中寻找。本文表明，拓扑系统中边界控制的手性边缘态为非互易超导输运提供了一种简单却常被忽视的机制。以手性 Kagome 反铁磁体为例，面外自旋倾斜或自旋轨道耦合打开了高陈数的体能隙，产生多个手性边缘模式。晶格依赖的边界终止为边缘态选择了单谷特性，导致相对边缘处的边缘光谱不对称。这种边界不对称直接在垂直于边缘的约瑟夫森结中产生可观测的非互易特征，包括不对称安德列夫光谱、约瑟夫森二极管效应和反常夫琅禾费干涉图案。这些发现拓宽了对超导非互易性的微观理解，并突出了边界工程作为通往超导二极管器件的可调途径。
英文摘要
Nonreciprocal superconducting transport enables dissipationless rectification and has attracted considerable interest, yet its microscopic origin is typically sought in bulk electronic states. Here, we show that boundary-controlled chiral edge states in topological systems provide a simple yet largely overlooked mechanism for nonreciprocal superconducting transport. Focusing on chiral kagome antiferromagnets, we demonstrate that out-of-plane spin canting or spin-orbit coupling opens a high-Chern-number bulk gap, giving rise to multiple chiral edge modes. Strikingly, sublattice-dependent boundary termination selects a single-valley character for the edge states, leading to asymmetric edge spectra at opposite edges. This boundary asymmetry directly yields observable nonreciprocal signatures in Josephson junctions oriented transverse to the edges, including asymmetric Andreev spectra, Josephson diode effect, and anomalous Fraunhofer interference patterns. These findings broaden the microscopic understanding of superconducting nonreciprocity and highlight boundary engineering as a tunable route toward superconducting diode devices.
Comments10 pages, 4 figures
