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首页> 外文期刊>Physical review >Lateral Josephson effect on the surface of the magnetic Weyl semimetal Co_3Sn_2S_2
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Lateral Josephson effect on the surface of the magnetic Weyl semimetal Co_3Sn_2S_2

机译：磁性Weyl半金属Co_3Sn_2S_2表面上的横向Josephson效应

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摘要

We experimentally study lateral electron transport between two 5-μm-spaced superconducting indium leads on a top of magnetic Weyl semimetal Co_3Sn_2S_2. For the disordered magnetic state of Co_3Sn_2S_2 crystal, we observe only the Andreev reflection in the proximity of each of the leads, which is indicative of highly transparent In-Co_3Sn_2S_2 interfaces. If the sample is homogeneously magnetized, it demonstrates a well-developed anomalous Hall effect state. In this regime we find the Josephson current that takes place even for 5-μm-long junctions and show the unusual magnetic field and temperature dependencies. As a possible reason for the results obtained, we discuss the contribution to the proximity-induced spin-triplet Josephson current from the topologically protected Fermi-arc states on the surface of Co_3Sn_2S_2.
机译：我们通过实验研究了磁性Weyl半金属Co_3Sn_2S_2顶部两个5μm间距的超导铟导线之间的横向电子传输。对于Co_3Sn_2S_2晶体的无序磁态，我们仅观察到每个引线附近的Andreev反射，这表明In-Co_3Sn_2S_2界面高度透明。如果样品被均匀地磁化，则表明发展良好的异常霍尔效应状态。在这种情况下，我们发现即使在5μm长的结处也会发生约瑟夫森电流，并显示出不寻常的磁场和温度依赖性。作为获得结果的可能原因，我们讨论了Co_3Sn_2S_2表面上拓扑受保护的费米电弧态对邻近感应自旋三重态约瑟夫森电流的贡献。

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