Gapless excitations in strongly fluctuating superconducting wires

Dganit Meidan, Bernd Rosenow, Yuval Oreg, Gil Refael

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number227004
JournalPhysical Review Letters
Volume107
Issue number22
DOIs
StatePublished - 22 Nov 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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