Proximity effect on the superconducting transition temperature of YBa sub 2 Cu sub 3 O sub 7 minus x /PrBa sub 2 Cu sub 3 O sub 7 minus x superlattices

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.44.411· OSTI ID:5748430

Wu, J Z; Ting, C S; Chu, W K ^[1]; Yao, X X ^[2]

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1. Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas 77204 (US)
2. Department of Physics, Nanjing University, Nanjing, (China)

The superconducting transition temperature {ital T}{sub {ital c}} of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}/PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} superlattices is studied theoretically with use of the Gor'kov equation. We show that the proximity effect in which the pair amplitude of the superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} layer leaks to the semiconducting PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} layer plays a dominant role in explaining the depression of {ital T}{sub {ital c}} in these superlattices with a minor modification from the charge-carrier-transfer effect across the Y and Pr interface. By adjusting the value of the hopping matrix between the Cu-O plane, our numerical result can be quantitatively compared with recent experimental measurement of {ital T}{sub {ital c}} in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}/PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} superlattices.

• OSTI ID: 5748430
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 44:1; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
PROXIMITY EFFECT
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
CHARGE EXCHANGE
GORKOV-ELIASHBERG THEORY
QUATERNARY COMPOUNDS
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity