2000/05/31 by Denis Dalidovich, Philip Phillips · 6 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #cond-mat
paper · pdf · doi:10.1103/physrevb.64.052507
published as Phys. Rev. B, vol. 64, 52507-1 (2001). · A figure has been added and the physics has been clarified. To appear in PRB
arxiv created 2001/05/29 · openalex publication_date 2001/07/13 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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, \ensuremathσ=(2/\ensuremathπ)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.