1997/05/14 by A. Malinowski, Marta Z. Cieplak, A. S. van Steenbergen +7 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.79.495
8 pages, 5 figures
arxiv created 1997/05/14 · openalex publication_date 1997/07/21 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Magnetoresistance measurements of highly underdoped superconducting La_2\ensuremath-xSrxCuO4 films with x\phantom\rule0ex0ex=\phantom\rule0ex0ex0.051 and x\phantom\rule0ex0ex=\phantom\rule0ex0ex0.048, performed in dc magnetic fields up to 20 T and at temperatures down to 40 mK, reveal a magnetic-field--induced transition from weak to strong localization in the normal state. The normal-state conductances per CuO2 plane, measured at different fields in a single specimen, are found to collapse to one curve with the use of a single scaling parameter that is inversely proportional to the localization length. The scaling parameter extrapolates to zero near zero field and possibly at a finite field, suggesting that in the zero-field limit the electronic states may be extended.