Possible robust insulator-superconductor transition on solid inert gas and other substrates
Superconductivity
2009-10-31 v1
Abstract
We present observations of the insulator-superconductor transition in ultrathin films of Bi on amorphous quartz, quartz coated with Ge, and for the first time, solid xenon condensed on quartz. The relative permeability ranges from 1.5 for Xe to 15 for Ge. Though we find screening effects as expected, the I-S transition is robust, and unmodified by the substrate. The resistance separatrix is found to be close to h/4e^2 and the crossover thickness close to for all substrates. I-V studies and Aslamazov-Larkin analyses indicate superconductivity is inhomogeneous. The transition can be understood in terms of a percolation model.
Cite
@article{arxiv.cond-mat/0011197,
title = {Possible robust insulator-superconductor transition on solid inert gas and other substrates},
author = {K. Das Gupta and G. Sambandamurthy and Swati S. Soman and N. Chandrasekhar},
journal= {arXiv preprint arXiv:cond-mat/0011197},
year = {2009}
}
Comments
accepted in Physical Review B