Fluctuation conductivity in insulator-superconductor transitions with dissipation

Denis Dalidovich, Philip Phillips

Research output: Contribution to journalArticlepeer-review

Abstract

We analyze here the fluctuation conductivity in the vicinity of the critical point in a 2D Josephson junction array shunted by an Ohmic resistor. We find that, at the Gaussian level, the conductivity acquires a logarithmic dependence on T/m (m is the inverse correlation length) when the dissipation is sufficiently small. In the renormalized classical regime, this logarithmic dependence gives rise to a leveling off of the resistivity at low to intermediate temperatures when fluctuations are included. We show, however, that this trend does not persist to T = 0 at which point the resistivity vanishes. The possible relationship of the leveling of the resistivity to the low temperature transport in granular superconductors is discussed.

Original languageEnglish (US)
Pages (from-to)737-740
Number of pages4
JournalPhysical review letters
Volume84
Issue number4
DOIs
StatePublished - Jan 24 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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