Magnetic-Field{endash}Induced Localization in the Normal State of Superconducting La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4}
- Institute of Physics, Polish Academy of Sciences, 02 668 Warsaw (Poland)
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855 (United States)
- Research Institute for Materials, High Field Magnet Laboratory, University of Nijmegen, 6525 ED Nijmegen (The Netherlands)
Magnetoresistance measurements of highly underdoped superconducting La{sub 2{minus}x}Sr {sub x}CuO{sub 4} films with x=0.051 and x=0.048 , performed in dc magnetic fields up to 20T and at temperatures down to 40mK, reveal a magnetic-field{endash}induced transition from weak to strong localization in the normal state. The normal-state conductances per CuO{sub 2} 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. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 527040
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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