title: Metallic nonsuperconducting phase and D-wave superconductivity in Zn-substituted La1.85Sr0.15CuO4
abstract: Measurements of the resistivity, magnetoresistance, and penetration depth were made on films of La1.85Sr0.15CuO4, 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 k(F)l approximately 1, and appears to be disorder driven, with the carrier concentration unaffected by doping.
authors.affiliation: Institute of Physics, Polish Academy of Sciences, 02 668 Warsaw, Poland.
authors.initials: K
authors.lastname: Karpinska
authors.initials: MZ
authors.lastname: Cieplak
authors.initials: S
authors.lastname: Guha
authors.initials: A
authors.lastname: Malinowski
authors.initials: T
authors.lastname: Skoskiewicz
authors.initials: W
authors.lastname: Plesiewicz
authors.initials: M
authors.lastname: Berkowski
authors.initials: B
authors.lastname: Boyce
authors.initials: TR
authors.lastname: Lemberger
authors.initials: P
authors.lastname: Lindenfeld