Transport and magnetic properties of Tl sub 2 Ba sub 2 CuO sub 6+. delta. showing a. delta. -dependent gradual transition from an 85-K superconductor to a nonsuperconducting metal
- Fundamental Research Laboratories, NEC Corporation, 4-1-1 Miyazaki, Miyamae-ku, Kawasaki 213, Japan (JP)
Transport and magnetic properties are investigated for Tl{sub 2}Ba{sub 2}CuO{sub 6+{delta}}, which shows a gradual transition from an 85-K superconductor to a nonsuperconducting normal metal, as the excess oxygen content {delta} is increased from {similar to}0 to {similar to}0.1. Hall measurements demonstrate that this transition arises from an overdoping of the hole carriers by excess oxygen. The temperature dependence of the resistivity is well fitted to a power-law dependence for all {delta}'s, while the exponent shows a systematic change from linear ({delta}{similar to}0) to quadratic ({delta}{similar to}0.1) dependence. No significant changes of the Hall coefficient nor spin susceptibility are observed at the superconductor-metal phase boundary, suggesting a similarity and continuity between both the electronic structures. This is in sharp contrast to the previous observations for La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4}.
- OSTI ID:
- 5810045
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:10; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CORRELATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ELEMENTS
HALL EFFECT
HIGH-TC SUPERCONDUCTORS
MEISSNER-OCHSENFELD EFFECT
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
STOICHIOMETRY
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE