The interplay of superconductivity and localization in Nd{2-x}Ce{x}CuO{4+δ} single crystal films

Details The interplay of superconductivity and localization in Nd{2-x}Ce{x}CuO{4+δ} single crystal films The interplay of superconductivity and localization in Nd{2-x}Ce{x}CuO{4+δ} single crystal films

2002-05-06

arxiv.org/abs/cond-mat/0205090v1

Physics

Condensed Matter

Superconductivity

8 pages, 8 postscript figures, submitted to Physica C

Scientific paper

10.1016/S0921-4534(02)01320-5

The influence of nonstoichiometric disorder on the in-plane resistivity and SC-transition has been investigated for Nd{2-x}Ce{x}CuO{4+\delta} single crystal films (x=0.15 and 0.18). It is shown that with increasing of $\delta$ the in-plane normal state resistivity increases (the mean free path diminishes) and SC-transition temperature decreases with essential broadening of the transition region. The observed evolution from homogeneous metallic (and superconducting) Nd{2-x}Ce{x}CuO{4+\delta} system to inhomogeneous dielectric one is described as Anderson-type disorder-induced transition in a two-dimensional electron system.

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