Magnetic-Field Induced Superconductor-Insulator Transition in the La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4} System

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.3033· OSTI ID:385793

Karpinska, K; Malinowski, A; Cieplak, M Z; Guha, S; Gershman, S; Kotliar, G; Skoskiewicz, T; Plesiewicz, W; Berkowski, M; Lindenfeld, P ^[1]

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1. Institute of Physics, Polish Academy of Sciences, 02 668 Warsaw (Poland)

The magnetoresistance of underdoped La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO films with {ital x}=0.048 and 0.051 is studied in magnetic fields up to 8.5T and at temperatures down to 30mK. 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 {open_quote}{open_quote}bosonic insulator{close_quote}{close_quote} phase. The ground state in the absence of superconductivity appears to be insulating. The transitions become narrower below 1K and show that the resistive critical field diverges approaching zero temperature, as has also been observed in other high-{ital T}{sub {ital c}} systems. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 385793
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER OXIDES
CRITICAL FIELD
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
MAGNETORESISTANCE
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
THIN FILMS
TRANSITION TEMPERATURE