Transition metal dichalcogenide nanotubes are fascinating platforms for the research of superconductivity due to their unique dimensionalities and geometries. Here we report the diameter dependence of superconductivity in individual WS₂ nanotubes. The superconductivity is realized by electrochemical doping via the ionic gating technique in which the diameter of the nanotube is estimated from the periodic oscillating magnetoresistance, known as the Little-Parks effect. The critical temperature of superconductivity displays an unexpected linear behavior as a function of the inverse diameter, that is, the curvature of the nanotube. The present results are an important step in understanding the microscopic mechanism of superconductivity in a nanotube, opening up a new way of superconductivity in crystalline nanostructures.

中文翻译：

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单个WS ₂纳米管中与直径有关的超导性

过渡金属二硫化碳纳米管因其独特的尺寸和几何形状而成为研究超导性的迷人平台。在这里，我们报告了单个WS ₂中超导的直径依赖性纳米管。超导电性是通过离子门控技术通过电化学掺杂实现的，其中纳米管的直径是根据周期振荡磁阻来估算的，这被称为Little-Parks效应。超导的临界温度显示出意外的线性行为，该线性行为是反直径（即纳米管的曲率）的函数。目前的结果是理解纳米管中超导电性微观机制的重要步骤，为晶体纳米结构中的超导电性开辟了新途径。