Abstract
We report on a striking correlation in the electrical transport behavior of very high-quality (j/sub c/approx.3.4 x 10/sup 6/ A/cm/sup 2/ at T = 77 K) epitaxial thin films of high-T/sub c/ Y-Ba-Cu-O in the normal state. With increasing superconducting performance, as characterized by the transition temperature, transition-temperature width, and critical current density, the resistivity rho, and the Hall coefficient R/sub H/, both assume remarkably simple temperature dependences rho = ..cap alpha..T and R/sub H//sup -1/ = ..beta..T leading to a Hall mobility ..mu../sub H/proportionalT/sup -2/. The magnetoresistance at 10 T is less than chemically bond..delta..rho/rhochemically bond<10/sup -3/. We discuss an extreme two-carrier model to assess the T dependence of R/sub H/. .AE
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