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

G. I. Harus; A. I. Ponomarev; A. N. Ignatenkov; T. B. Charikova; L. D. Sabirzyanova; N. G. Shelushinina; V. F. Elesin; A. A. Ivanov; I. A. Rudnev

doi:10.1016/S0921-4534(02)01320-5

paper

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

arXiv:cond-mat/0205090 · doi:10.1016/S0921-4534(02)01320-5

Abstract

The influence of nonstoichiometric disorder on the in-plane resistivity and SC-transition has been investigated for Nd{2-x}Ce{x}CuO{4+δ} single crystal films (x=0.15 and 0.18). It is shown that with increasing of $δ$ 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+δ} system to inhomogeneous dielectric one is described as Anderson-type disorder-induced transition in a two-dimensional electron system.

8 pages, 8 postscript figures, submitted to Physica C