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电气步缘接触到一个拓超导体候选 2M-WS₂

Qikang Gan¹, Junwei Song¹, Hailing Guo^2,3

¹National Laboratory of Solid-State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing, 210093, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|November 14, 2025

概括

研究人员开发了一种用于二维拓超导体 (TSC) 的新型接触方法,实现了低电阻和高质量. 这一突破使得使用2M-WS2.2等材料的先进电子设备成为可能.

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
量子计算是一种量子计算.

背景情况:

拓超导体 (TSC) 对于托管Majorana绑定状态至关重要.
环境敏感性和不良的电气接触阻碍了二维TSC的实际应用.
现有的制造方法在封装和高质量的接触方面扎,用于2D TSC.

研究的目的:

为封装的2D拓超导体候选人开发一种新的接触几何.
为了实现低接触电阻和高质量的电气连接到二维TSC.
研究2M-WS2的内在特性及其对电子设备的潜力.

主要方法:

封装的2M-WS2设备的制造,具有新的阶梯边缘金属接触.
电力传输测量,包括临界电流 (I_C) 和差电阻 (dV/dI) 分析.
研究Andreev反射以评估TSC金属接口的透明度.

主要成果:

实现了非常低的接触电阻 (在六个单元设备中降至~65 Ω·μm).
通过安德里耶夫反射证明了高度透明的TSC金属接口.
在I_C观察到双重旋转对称性和dV/dI的异常峰值,表明多间隙超导.

结论:

新的阶梯边缘接触几何学克服了二维TSC设备制造中的重大挑战.
封装的2M-WS2表现出暗示多间隙超导性的内在特性.
这项工作为基于超导体的高性能拓电子铺平了道路.

关键词:

2M WS2 2M WS2 2M WS2是2M WS2的第二代产品之一.不同类型的异型性异型性多个口的多个口阶梯边缘接触接触方式拓上的超导体.

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