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Transport Properties near the z=2 Insulator-Superconductor Transition

Denis Dalidovich·Philip Phillips
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Abstract

We consider here the fluctuation conductivity near the point of the insulator-superconductor transition in a system of regular Josephson junction arrays in the presence of particle-hole asymmetry or equivalently homogeneous charge frustration. The transition is characterised by the dynamic critical exponent $z=2$, opening the possibility of the perturbative renormalization-group (RG) treatment. The quartic interaction in the Ginzburg-Landau action and the coupling to the Ohmic heat bath, giving the finite quasiparticle life-time, lead to the non-monotonic behavior of the dc conductivity as a function of temperature in the leading logarithmic approximation.

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Denis Dalidovich, Philip Phillips. 2001-05-29. Transport Properties near the z=2 Insulator-Superconductor Transition. https://doi.org/10.1103/physrevb.63.224503

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