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arXiv · 1108.1704

Gapless excitations in strongly fluctuating superconducting wires

Dganit Meidan·Bernd Rosenow·Yuval Oreg·Gil Refael
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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.

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Dganit Meidan, Bernd Rosenow, Yuval Oreg, Gil Refael. 2011-08-08. Gapless excitations in strongly fluctuating superconducting wires. https://doi.org/10.1103/physrevlett.107.227004

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