论文标题
纳米孔缺陷及其几何排列对依赖超导体的原子薄单晶的超流体密度的影响
Influence of nano-hole defects and their geometric arrangements on the superfluid density in atomically thin single crystals of indium superconductor
论文作者
论文摘要
使用SI（111）作为原子薄的超导体平台，并通过系统地控制纳米孔缺损的密度（纳米尺寸voids），我们揭示了缺陷密度的影响和缺陷的几何布置对宏观和微观长度尺度上超导性的几何布置对超导性的影响。当纳米孔缺陷均匀地分散在原子层中时，超流体密度随着缺陷密度的函数（从表面积的0.7％到5％）单调降低，过渡温度TC的略有变化，以微观和宏观的方式测量。由于缺陷密度从5％增加到6％，这些点缺陷被组织成包含个别二维斑块的缺陷链。这种缺陷的新几何布置极大地影响了超导性，从而导致宏观超流体密度的总消失和微观超导间隙的崩溃。这项研究阐明了对局部缺陷及其几何布置如何在二维极限上影响超导性的理解。
Using Indium on Si(111) as an atomically thin superconductor platform, and by systematically controlling the density of nano-hole defects (nanometer size voids), we reveal the impacts of defects density and defects geometric arrangements on superconductivity at macroscopic and microscopic length scales. When nano-hole defects are uniformly dispersed in the atomic layer, the superfluid density monotonically decreases as a function of defect density (from 0.7% to 5% of the surface area) with minor change in the transition temperature Tc, measured both microscopically and macroscopically. With a slight increase in the defect density from 5% to 6%, these point defects are organized into defect chains that enclose individual two-dimensional patches. This new geometric arrangement of defects dramatically impacts the superconductivity, leading to the total disappearance of macroscopic superfluid density and the collapse of the microscopic superconducting gap. This study sheds new light on the understanding of how local defects and their geometric arrangement impact superconductivity in the two-dimensional limit.
