1999/03/04 by A. Malinowski, Malinowski, A., A. Krickser +12
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed Matter (cond-mat) #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9903080
4 pages, 5 postscript figures
arxiv created 1999/03/04 · openalex publication_date 1999/03/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The effect of zinc doping on the anomalous temperature dependence of the magnetoresistance and the Hall effect in the normal state was studied in a series of La1.85Sr0.15Cu1-yZnyO4 films, with values of y between zero and 0.12. The orbital magnetoresistance at high temperatures is found to be proportional to the square of the tangent of the Hall angle, as predicted by the model of two relaxation rates, for all Zn-doped specimens, including nonsuperconducting films. The proportionality constant is equal to 13.7+/-0.5 independent of doping. This is very different from the behavior observed in underdoped La2-xSrxCuO4 films where a decrease of x destroys the proportionality. In addition, the behavior of the orbital magnetoresistance at low temperatures is found to be different depending on whether x is changed or y. We suggest that these differences reflect a different evolution of the pseudogap in the two cases.