在Kagome金属,K1-V3Sb5中产生异型近距离诱导的超导和边缘超电流
Yaojia Wang1,2, Shuo-Ying Yang1, Pranava K Sivakumar1
1Max Planck Institute of Microstructure Physics, 06108 Halle, Saxony-Anhalt, Germany.
Science advances
|July 12, 2023
概括
研究人员制造了约瑟夫森结的瓦纳抗氧化物 (K1-V3Sb5),观察独特的磁场效应和边缘状态. 这些发现表明了旋转三重超导和新的约瑟夫森装置的潜力.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子现象是一种量子现象.
背景情况:
- 卡戈梅格子材料对于它们的强相关性,磁性和电子拓学的相互作用至关重要.
- 瓦纳抗氧化物 (K1-V3Sb5) 是一个分层的拓金属,具有瓦纳卡戈梅网.
研究的目的:
- 使用K1-V3Sb5来制造约瑟夫森连接点,并研究其超导特性.
- 探索无极性内部磁场对超导合的影响,并确定潜在的非传统超导机制.
- 调查边缘状态在基于K1-V3Sb5的设备中的作用.
主要方法:
- 使用K1-V3Sb5.制造约瑟夫森十字路口.
- 测量磁阻和临界电流与相位的测量.
- 在平面内和平面外磁场下的干扰模式的分析.
主要成果:
- 在K1-V3Sb5中,超导被诱导并维持在长连接长度上.
- 对于平面内磁场,观察到方向依赖的磁阻和异型的弗劳恩霍弗模式.
- 对外平面磁场的关键电流的抑制表明存在一种异构的内部磁场.
- 通过快速振荡检测到来自边缘状态的空间局部导电通道的证据.
结论:
- 观察到的现象表明,异性磁场效应影响了K1-V3Sb5的超导合,这可能表明了旋转三极超导.
- 边缘状态的存在为研究卡戈梅金属中的非传统超导开辟了道路.
- 这些发现确立了K1-V3Sb5作为开发利用电子相关性和拓学的新约瑟夫森设备的有希望的平台.
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