Vortex Variable Range Hopping in a Conventional Superconducting Film
Abstract
The behavior of a disordered amorphous thin film of superconducting Indium Oxide has been studied as a function of temperature and magnetic field applied perpendicular to its plane. A superconductor-insulator transition has been observed, though the isotherms do not cross at a single point. The curves of resistance vs. temperature on the putative superconducting side of this transition, where the resistance decreases with decreasing temperature, obey two-dimensional Mott variable-range hopping of vortices over wide ranges of temperature and resistance. To estimate the parameters of hopping, the film is modeled as a granular system and the hopping of vortices is treated in a manner analogous to hopping of charges. The reason the long range interaction between vortices over the range of magnetic fields investigated does not lead to a stronger variation of resistance with temperature than that of two-dimensional Mott variable-range hopping remains unresolved.
Cite
@article{arxiv.1709.04128,
title = {Vortex Variable Range Hopping in a Conventional Superconducting Film},
author = {Ilana M. Percher and Irina Volotsenko and Aviad Frydman and Boris I. Shklovskii and Allen M. Goldman},
journal= {arXiv preprint arXiv:1709.04128},
year = {2017}
}
Comments
7 pages, 7 figures