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.
@article{arxiv.cond-mat/9911149,
title = {Metallic nonsuperconducting phase and d-wave superconductivity in Zn-substituted LaSrCuO},
author = {K. Karpinska and Marta Z. Cieplak and S. Guha and A. Malinowski and T. Skoskiewicz and W. Plesiewicz and M. Berkowski and B. Boyce and Thomas R. Lemberger and P. Lindenfeld},
journal= {arXiv preprint arXiv:cond-mat/9911149},
year = {2007}
}
Comments
4 pages,4 figures, to appear in PRL Replacement of the original paper incorporates minor revisions suggested by the referee