2001/08/23 by Marta Z. Cieplak, A. Malinowski, K. Karpińska +11 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat
paper · pdf · doi:10.1103/physrevb.65.100504
arxiv created 2001/08/23 · openalex publication_date 2002/02/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The influence of zinc doping and strain-related effects on the normal state transport properties (the resistivity, \ensuremathρ, the Hall angle, \ensuremathΘH, and the orbital magnetoresistance, \ensuremathΔ\ensuremathρ/\ensuremathρ) is studied in a series of La1.85Sr0.15Cu_1\ensuremath-yZnyO4 films, with values of y between zero and 0.12 and various degrees of strain induced by the mismatch between the films and the substrate. The zinc doping affects only the constant term in the temperature dependence of cot\ensuremathΘH but the strain affects both the slope and the constant term, while their ratio remains constant. \ensuremathΔ\ensuremathρ/\ensuremathρ is decreased by zinc doping but is unaffected by strain. The ratio (\ensuremathΔ\ensuremathρ/\ensuremathρ)/tan2\ensuremathΘH is T-independent but decreases with impurity doping. These results put strong constraints on theories of the normal state of high-temperature superconductors.