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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
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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.

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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. 2002-05-06. The interplay of superconductivity and localization in Nd{2-x}Ce{x}CuO{4+δ} single crystal films. https://doi.org/10.1016/s0921-4534(02)01320-5

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