Overdoped metals in the Tl[sub 2]Ba[sub 2]CuO[sub 6+[delta]] and TlSr[sub 2]CaCu[sub 2]O[sub 7[minus][delta]] systems

Journal Article · Wed Nov 30 23:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.16033· OSTI ID:7093864

Shimakawa, Y ^[1]; Jorgensen, J D ^[2]; Manako, T; Kubo, Y ^[3]

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1. Materials Science Division and Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439 (United States) Fundamental Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba 305 (Japan)
2. Materials Science Division and Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Fundamental Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba 305 (Japan)

We have synthesized overdoped metallic samples of Tl[sub 2]Ba[sub 2]CuO[sub 6+[delta]] and TlSr[sub 2]CaCu[sub 2]O[sub 7[minus][delta]] beyond the superconductor-metal phase boundary by annealing the samples in high-pressure oxygen. Oxygen incorporation is clearly demonstrated by structural refinements of neutron powder-diffraction data and reversible changes in sample weight. The same [similar to][ital T][sup 2] scattering mechanism in transport properties as previously observed in superconducting samples is observed in the present overdoped metallic samples. Hall coefficients do not change sign and are still positive for the overdoped metals. Although the crystal structures of both compounds change gradually and continuously with oxygen doping beyond the superconductor-metal phase boundary, the electronic structure of the further overdoped metals'' might still be near the supeconductor-metal phase boundary.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7093864
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:21; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOY SYSTEMS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DOPED MATERIALS
ELECTRONIC STRUCTURE
ELEMENTS
HALL EFFECT
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
MATERIALS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
QUATERNARY ALLOY SYSTEMS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS