Nonlinear ac Resistivity in s-Wave and d-Wave Disordered Granular Superconductors

Mai Suan Li; Hoang Zung; D. Domínguez

doi:10.1103/PhysRevLett.88.257004

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Nonlinear ac Resistivity in s-Wave and d-Wave Disordered Granular Superconductors

Mai Suan Li, Hoang Zung, D. Domínguez

DOI 10.1103/PhysRevLett.88.257004 · Physical Review Letters

T1

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Abstract

We model s-wave and d-wave disordered granular superconductors with a three-dimensional lattice of randomly distributed Josephson junctions. The nonlinear ac resistivity ρ2 of these systems was calculated using Langevin dynamical equations. The current amplitude dependence of ρ2 at the peak position is found to be a power law characterized by exponent α, which is not universal but depends on the self-inductance and current regimes. In the weak current regime α is independent of the self-inductance and α=0.5±0.1 for both s- and d-wave materials. In accord with experiments, we find α≈1 for some interval of inductance in the strong current regime.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown