异质超晶格V $_5$ S $_8$中约瑟夫森结的非对称夫琅和费花样
Asymmetric Fraunhofer pattern in Josephson junctions from heterodimensional superlattice V$_5$S$_8$
摘要：
在约瑟夫森结（JJ）中引入自旋-轨道耦合（SOC）会引起不寻常的约瑟夫森效应。我们研究了基于一种新发现的异质超晶格V $_5$ S $_8$的异质结，这种异质结具有特殊的SOC形式，其独特的同质界面使得我们的异质结能够消除界面和无序所带来的非本征效应。我们观察到不对称的夫琅和费图案的垂直磁场和电流。非对称性受面内磁场的影响。图案的分析指出，约瑟夫森电流的非平凡的空间分布，这是固有的SOC在V $_5$ S $_8$。
英文摘要：
Introduction of spin-orbit coupling (SOC) in a Josephson junction (JJ) gives rise to unusual Josephson effects. We investigate JJs based on a newly discovered heterodimensional superlattice V$_5$S$_8$ with a special form of SOC. The unique homointerface of our JJs enables elimination of extrinsic effects due to interfaces and disorder. We observe asymmetric Fraunhofer patterns with respect to both the perpendicular magnetic field and the current. The asymmetry is influenced by an in-plane magnetic field. Analysis of the pattern points to a nontrivial spatial distribution of the Josephson current that is intrinsic to the SOC in V$_5$S$_8$.
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