Spatial dependence of the superconducting order parameter near an Anderson impurity

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.3933· OSTI ID:6171751

Kim, H; Muzikar, P ^[1]

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1. Department of Physics, Purdue University, West Lafayette, Indiana 47907 (United States)

We develop a general theory for the local environment of a magnetic impurity in a superconductor, using an Anderson model to describe the impurity. We can thus cover many regimes (i.e, Kondo, mixed valence) of physical interest. A general formula expressing the perturbed order parameter, [delta][Delta]([bold q]), in terms of the impurity [ital t] matrix is derived; this formula is then used to derive a simple expression, valid as [ital T][r arrow][ital T][sub [ital c]], relating the total volume integral of [delta][Delta]([bold r]) to the change in [ital T][sub [ital c]] with impurity concentration. Finally, explicit curves for [delta][Delta]([bold r]) are computed for the Hartree-Fock limit.

• OSTI ID: 6171751
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:6; 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
CALCULATION METHODS
HARTREE-FOCK METHOD
HYBRIDIZATION
KONDO EFFECT
ORDER PARAMETERS
PHYSICAL PROPERTIES
SUBSTOICHIOMETRY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE