Specific heat discontinuity of a proximity-effect sandwich system containing Kondo impurities

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00683229· OSTI ID:5635805

Yoksan, S

The theoretical work of Matsuura, Ichinose, and Nagaoka on the Kondo effect in superconductors and McMillan's tunneling model are applied to a proximity-effect sandwich system containing Kondo impurities. Analytic expressions for the renormalized Green's functions of superconducting and normal-metal electrons are given as functions of the system composition. It is found that as the thicknesses become large, the specific heat discontinuity changes continuously from the Mueller-Hartmann-Zittartz value for the magnetic cases to the Ichinose value for the nonmagnetic ones. For small values of the layer thickness, and with the films in proximity, our results can be used to calculate the specific heat jump at the transition temperature numerically.

• Research Organization: Department of Physics, Srinakharinwirot University, Prasarnmitr, Bangkok, Thailand
• OSTI ID: 5635805
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 51:5; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY
FREE ENERGY
FUNCTIONS
GREEN FUNCTION
HAMILTONIANS
JUNCTIONS
KONDO EFFECT
MATHEMATICAL OPERATORS
ORDER PARAMETERS
PHYSICAL PROPERTIES
PROXIMITY EFFECT
QUANTUM OPERATORS
RENORMALIZATION
SPECIFIC HEAT
SUPERCONDUCTING JUNCTIONS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES