The proximity-coupling of a chiral non-collinear antiferromagnet (AFM)^1,2,3,4,5 with a singlet superconductor allows spin-unpolarized singlet Cooper pairs to be converted into spin-polarized triplet pairs^6,7,8, thereby enabling non-dissipative, long-range spin correlations^{9,10,11,12,13,14}. The mechanism of this conversion derives from fictitious magnetic fields that are created by a non-zero Berry phase¹⁵ in AFMs with non-collinear atomic-scale spin arrangements^1,2,3,4,5. Here we report long-ranged lateral Josephson supercurrents through an epitaxial thin film of the triangular chiral AFM Mn₃Ge (refs. ^3,4,5). The Josephson supercurrents in this chiral AFM decay by approximately one to two orders of magnitude slower than would be expected for singlet pair correlations^{9,10,11,12,13,14} and their response to an external magnetic field reflects a clear spatial quantum interference. Given the long-range supercurrents present in both single- and mixed-phase Mn₃Ge, but absent in a collinear AFM IrMn¹⁶, our results pave a way for the topological generation of spin-polarized triplet pairs^6,7,8 via Berry phase engineering¹⁵ of the chiral AFMs.

手性非共线反铁磁体 (AFM) ^1,2,3,4,5与单重态超导体的邻近耦合允许将自旋非极化单重态库珀对转换为自旋极化三重态对^6,7,8，从而启用非耗散、长程自旋相关^{9,10,11,12,13,14}。这种转换的机制源自虚构的磁场，该磁场由具有非共线原子尺度自旋排列^{1,2,3,4,5 的}AFM 中的非零贝瑞相^{15 产生}。在这里，我们通过三角形手性 AFM Mn ₃ Ge的外延薄膜报告了长程横向约瑟夫森超电流（参考文献^3,4,5）。^{这种手性 AFM 中的约瑟夫森超电流衰减大约比单重态对相关9、10、11、12、13、14}的预期慢一到两个数量级，并且它们对外部磁场的响应反映了明显的空间量子干涉. 鉴于在单相和混合相 Mn ₃ Ge 中都存在长程超电流，但在共线 AFM IrMn ¹⁶中不存在，我们的结果为通过 Berry拓扑生成自旋极化三重态对^6、7、8铺平了道路手性原子力显微镜的相位工程¹⁵。