Electronic Transport in the Low-Temperature Liquid Phase of a Thin Amorphous Film without the Edge Effects

Abstract

We study the possible edge‐pinning effects on the transport properties in the low‐temperature (T) liquid phase of a thin amorphous MoxSi1−x film with the Corbino‐Disk (CD) and strip‐like contact geometries. In CD, in the presence of a radial current, field‐induced vortices rotate around the center of the sample without crossing the sample edges and, hence, the edge effects are negligible. In both geometries we observe the two‐dimensional field‐driven superconductor‐insulator transition at T → 0. This result indicates that the edge effects are not important and the absence of an intermediate metallic vortex phase at T= 0 is intrinsic in our thin amorphous films.