Excess conductivity in high-Tc superconducting thin films: Role of smooth doping disorder

R. Seto; R. Botet; H. Kuratsuji

doi:10.1103/PhysRevB.73.012508

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Excess conductivity in high-Tc superconducting thin films: Role of smooth doping disorder

R. Seto, R. Botet, H. Kuratsuji

DOI 10.1103/PhysRevB.73.012508 · Physical Review B

T1

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Abstract

While the time-dependent Ginzburg-Landau theory successfully describes a number of experimental results for homogeneous high-Tc superconductors, the proper value of the characteristic depairing electric field was recently found unreasonably small for Bi-Sr-Ca-Cu-O thin films. We present numerical simulations which show that these features can be the consequence of smooth spatial inhomogeneity of the local critical temperature. Because of the interplay of percolation and superconducting transition, even a small disorder affects strongly the nonlinear excess conductivity in the transition region, causing considerable rescaling of the characteristic electric field.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Y1-xPrxBa2-ySryCu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown