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arXiv:cond-mat/0302547 · The European Physical Journal B

Fluctuation conductivity in layered d-wave superconductors near critical disorder

I. Tifrea, D. Bodea, I. Grosu, M. Crisan

Published Dec 1, 2003• 1 citation
arXivHTMLPDF
DOI
10.1140/epjb/e2003-00356-3

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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.