Magnetic-Field Induced Superconductor-Insulator Transition in the La2−xSrxCuO4 System
K. Karpińska, A. Malinowski, Marta Z. Cieplak, S. Guha, S. Gershman, G. Kotliar, T. Skośkiewicz, W. Plesiewicz, M. Berkowski, P. Lindenfeld
DOI 10.1103/PhysRevLett.77.3033 · Physical Review Letters
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Abstract
The magnetoresistance of underdoped La2−xSrxCuO films with x=0.048 and 0.051 is studied in magnetic fields up to 8.5 T and at temperatures down to 30 mK. The results indicate that the magnetic-field induced superconductor-insulator (SI) transition is qualitatively different from the reentrant transition described for indium oxide and interpreted as leading to a “bosonic insulator” phase. The ground state in the absence of superconductivity appears to be insulating. The transitions become narrower below 1 K and show that the resistive critical field diverges approaching zero temperature, as has also been observed in other high- Tc systems.
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. | 4 | Pressure not reported | zero_resistance |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | zero_resistance |
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