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

Journal Article · Wed Jun 01 00:00:00 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), Vol. 51:5
• Country of Publication: United States
• Language: English

Related Subjects

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