Interaction-induced Bose metal in two dimensions

Denis Dalidovich, Philip Phillips

Research output: Contribution to journalArticlepeer-review

Abstract

We show here that the regularization of the conductivity resulting from the bosonic interactions on the "insulating" (quantum-disordered) side of an insulator-superconductor transition in two dimensions, gives rise to a metal with a finite conductivity, σ= (2/π)4e2/h, as temperature tends to zero. The Bose metal is stable to weak disorder and hence represents a concrete example of an interaction-induced metallic phase. The phenomenological inclusion of dissipation reinstates the anticipated insulating behavior in the quantum-disordered regime. Hence, we conclude that the traditionally studied insulator-superconductor transition, which is driven solely by quantum fluctuations, corresponds to a superconductor-metal transition. The possible relationship to experiments on superconducting thin films in which a low-temperature metallic phase has been observed is discussed.

Original languageEnglish (US)
Article number052507
Pages (from-to)525071-525074
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number5
DOIs
StatePublished - Aug 1 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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