Fluctuation conductivity in layered d-wave superconductors near critical disorder

Details Fluctuation conductivity in layered d-wave superconductors near critical disorder Fluctuation conductivity in layered d-wave superconductors near critical disorder

2003-02-26

arxiv.org/abs/cond-mat/0302547v2

Physics

Condensed Matter

Final version to be published in Eur. Phys. J. B

Scientific paper

10.1140/epjb/e2003-00356-3

We consider the fluctuation conductivity in the critical region of a disorder induced quantum phase transition in layered d-wave superconductors. We specifically address the fluctuation contribution to the system's conductivity in the limit of large (quasi-two-dimensional system) and small (quasi-three-dimensional system) separation between adjacent layers of the system. Both in-plane and c-axis conductivities were discussed near the point of insulator-superconductor phase transition. The value of the dynamical critical exponent, $z=2$, permits a perturbative treatment of this quantum phase transition under the renormalization group approach. We discuss our results for the system conductivities in the critical region as function of temperature and disorder.

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