Magnetic-Field–Induced Localization in the Normal State of Superconducting La2−xSrxCuO4
A. Malinowski, Marta Z. Cieplak, A. S. van Steenbergen, J. A. A. J. Perenboom, K. Karpińska, M. Berkowski, S. Guha, P. Lindenfeld
DOI 10.1103/PhysRevLett.79.495 · Physical Review Letters
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Abstract
Magnetoresistance measurements of highly underdoped superconducting La2−xSrxCuO4 films with x=0.051 and x=0.048, 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.8 | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.4 | Pressure not reported | unknown |
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