Transport Properties near the z=2 Insulator-Superconductor Transition

Details Transport Properties near the z=2 Insulator-Superconductor Transition Transport Properties near the z=2 Insulator-Superconductor Transition

2000-08-28

arxiv.org/abs/cond-mat/0008415v2

Phys. Rev. B, vol. 63, 224503 (2001).

Physics

Condensed Matter

Revised version for publication. To appear in PRB

Scientific paper

10.1103/PhysRevB.63.224503

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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