Insulator-to-Metal Crossover in the Normal State of La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4} Near Optimum Doping
Journal Article
·
· Physical Review Letters
- Bell Laboratories, Lucent Technologies, 700 Mountain Avenue, Murray Hill, New Jersey 07974 (United States)
- Department of Applied Chemistry, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113 (Japan)
- Superconductivity Research Course, University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113 (Japan)
A 61-T pulsed magnetic field suppresses superconductivity in La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4} single crystals and reveals an insulator-to-metal (IM) crossover for both in-plane resistivity {rho}{sub {ital ab}} and {ital c}-axis resistivity {rho}{sub {ital c}} at a Sr concentration near optimum doping ({ital x}{approx_equal}0.16). The IM transition is unusual in that {ital all} underdoped samples ({ital x}{lt}0.16) show low-temperature insulating behavior, even in samples with linear-{ital T} {rho}{sub {ital ab}} above {ital T}{sub {ital c}} and apparently large {ital k}{sub {ital F}}{ital l}.
- OSTI ID:
- 435242
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 27 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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