Two-fluid model for transport properties of granular superconductors

C. A. M. dos Santos; C. J. V. Oliveira; M. S. da Luz; A. D. Bortolozo; M. J. R. Sandim; A. J. S. Machado

doi:10.1103/PhysRevB.74.184526

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Two-fluid model for transport properties of granular superconductors

C. A. M. dos Santos, C. J. V. Oliveira, M. S. da Luz, A. D. Bortolozo, M. J. R. Sandim, A. J. S. Machado

DOI 10.1103/PhysRevB.74.184526 · Physical Review B

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Abstract

A two-fluid model is proposed to describe the transport properties of granular superconductors. Using the resistively shunted junction model and some aspects of the two-level system theory, a statistical model is developed which takes into account the ratio between the number of normal electrons and Cooper pairs carrying the applied current. The theoretical model reveals excellent agreement when compared to transport properties of four high-TC superconductors. The results suggest that the two-fluid model is independent of the sample composition, critical temperature, and whether the superconducting compound is electron or hole-doped.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Y1-xPrxBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sm2-xCexCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Y0.55Pr0.45Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown