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Gapless Excitations in Strongly Fluctuating Superconducting Wires

Meidan, Dganit and Rosenow, Bernd and Oreg, Yuval and Refael, Gil (2011) Gapless Excitations in Strongly Fluctuating Superconducting Wires. Physical Review Letters, 107 (22). Art. No. 227004. ISSN 0031-9007.

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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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Additional Information:© 2011 American Physical Society. Received 8 August 2011; published 22 November 2011. We acknowledge helpful discussions with E. A. Demler, B. I. Halperin, P. A. Lee, and T. Senthil. We thank the Packard Foundation, BSF, DIP, the Alexander von Humboldt Foundation and the Aspen Center for Physics.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Packard FoundationUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Aspen Center for PhysicsUNSPECIFIED
Issue or Number:22
Classification Code:PACS: 74.40.-n, 73.21.Hb, 74.55.+v, 74.78.Na
Record Number:CaltechAUTHORS:20111216-150959334
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28500
Deposited By: Tony Diaz
Deposited On:19 Dec 2011 18:30
Last Modified:04 Jun 2020 10:14

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