Occurrence of maximum T sub c at an optimal carrier concentration in superconducting bismuth and thallium cuprates

Journal Article · Mon Jan 29 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.103296· OSTI ID:7005337

Somasundaram, P; Vijayaraghavan, R; Nagarajan, R; Seshadri, R; Umarji, A M; Rao, C N.R. ^[1]

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1. Solid State and Structural Chemistry Unit and Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India (IN)

The superconducting transition temperatures in Bi{sub 2}Ca{sub 1{minus}{ital x}}Ln{sub {ital x}}Sr{sub 2}Cu{sub 2}O{sub 8+{delta}}, TlCa{sub 1{minus}{ital x}}Ln{sub {ital x}}Sr{sub 2}Cu{sub 2}O{sub 6+{delta}}, and Tl{sub 0.8}Ca{sub 1{minus}{ital x}}Ln{sub {ital x}}Ba{sub 2}Cu{sub 23}O{sub 6+{delta}} (Ln=Y or rare earth) vary with composition and show a maximum at a specific value of {ital x} or {delta}. This observation suggests that an optimal carrier concentration is required to attain maximum {ital T}{sub {ital c}} in such cuprates which seem to be two-band systems.

• OSTI ID: 7005337
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:5; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARRIER DENSITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES