Gapless excitations in strongly fluctuating superconducting wires
Mesoscale and Nanoscale Physics
2013-07-31 v1 Superconductivity
Abstract
We study the low temperature tunneling density of states of thin wires where superconductivity is destroyed through quantum phase-slip proliferation. Although this regime is believed to behave as an insulator, we show that for a large temperature range this phase is characterized by a conductivity falling off at most linearly with temperature, and has a gapless excitation spectrum. This novel conducting phase results from electron-electron interaction induced pair breaking. Also, it may help clarify the low temperature metallic features found in films and wires whose bulk realization is superconducting.
Cite
@article{arxiv.1108.1704,
title = {Gapless excitations in strongly fluctuating superconducting wires},
author = {Dganit Meidan and Bernd Rosenow and Yuval Oreg and Gil Refael},
journal= {arXiv preprint arXiv:1108.1704},
year = {2013}
}
Comments
4 pages, 2 figures