Metallic nonsuperconducting phase and d-wave superconductivity in Zn-substituted LaSrCuO

K. Karpinska; Marta Z. Cieplak; S. Guha; A. Malinowski; T. Skoskiewicz; W. Plesiewicz; M. Berkowski; B. Boyce; Thomas R. Lemberger; P. Lindenfeld

arXiv · cond-mat/9911149

Metallic nonsuperconducting phase and d-wave superconductivity in Zn-substituted LaSrCuO

K. Karpinska·Marta Z. Cieplak·S. Guha·A. Malinowski·T. Skoskiewicz·W. Plesiewicz·M. Berkowski·B. Boyce·Thomas R. Lemberger·P. Lindenfeld

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Abstract

Measurements of the resistivity, magnetoresistance and penetration depth were made on films of LaSrCuO with up to 12 at.% of Zn substituted for the Cu. The results show that the quadratic temperature dependence of the inverse square of the penetration depth, indicative of d-wave superconductivity, is not affected by doping. The suppression of superconductivity leads to a metallic nonsuperconducting phase, as expected for a pairing mechanism related to spin fluctuations. The metal-insulator transition occurs in the vicinity of kFl~1, and appears to be disorder-driven, with the carrier concentration unaffected by doping.

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K. Karpinska, Marta Z. Cieplak, S. Guha, A. Malinowski, T. Skoskiewicz, W. Plesiewicz, M. Berkowski, B. Boyce, Thomas R. Lemberger, P. Lindenfeld. 1999-11-23. Metallic nonsuperconducting phase and d-wave superconductivity in Zn-substituted LaSrCuO. https://arxiv.org/abs/cond-mat/9911149

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