Magnetic penetration depth of high- T sub c superconductors

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.7361· OSTI ID:5330489

Chi, H; Nagi, A D.S. ^[1]

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1. Guelph-Waterloo Program for Graduate Work in Physics, Department of Physics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 (CA)

The magnetic penetration depth in the local limit {lambda}({ital T}) for a high-{ital T}{sub {ital c}} superconductor has been calculated within the electron pairing induced by holes model proposed by us recently. The derivation of the formula for {lambda}({ital T}) is based on a new expression for the current-density operator which takes into account the nonparabolic band structure of the conduction electrons. Our numerical results for the temperature dependence of {lambda}({ital T}) when the hole concentration {delta}=0.263 (which corresponds to 90-K superconductors) are near to the BCS results for a conventional superconductor and also agree qualitatively with the experimental data on the single crystal of YBa{sub 2}Cu{sub 3}O{sub 7}. Our value for the zero-temperature penetration depth is also close to the experimental values for the single crystals of the above material.

• OSTI ID: 5330489
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:10; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CHALCOGENIDES
COPPER
CRYSTALS
ELEMENTS
INTERACTIONS
MAGNETIC FIELDS
METALS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
PENETRATION DEPTH
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES