Raman scattering of light off a superconducting alloy containing paramagnetic impurities

Journal Article · Sun Apr 01 04:00:00 EST 1979 · Phys. Rev., Sect. B. Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.19.3500· OSTI ID:6076959

Cuden, C B; Ramos, A d.S.

Raman scattering of light off a superconductor doped with a small concentration of paramagnetic impurities is discussed without recourse to the quasiparticle approximation. The scattering efficiency defined in terms of Kubo's nonlinear response theory in a form suitable for systematic diagrammatic expansion is used as the starting point. This is examined in the four-component Eliashberg-Gorkov space for the case of constant transition-matrix elements, in the limit of small momentum transfer (London limit), and in the Eliashberg approximation of neglecting the momentum dependence of the electronic self-energy. For the specific case of Fe impurities in quenched In films numerical calculations have been made for the ratio of the scattering efficiency in the superconducting and normal states as a function of the reduced frequency and temperature for different impurity concentrations.

• Research Organization: Instituto de Fisica, Universidade Federal da Bahia, Salvador, Brazil
• OSTI ID: 6076959
• Journal Information: Phys. Rev., Sect. B. Condens. Matter; (United States), Journal Name: Phys. Rev., Sect. B. Condens. Matter; (United States) Vol. 19:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656102* -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DOPED MATERIALS
ELEMENTS
FILMS
GORKOV-ELIASHBERG THEORY
IMPURITIES
INDIUM
IRON
MAGNETISM
METALS
PARAMAGNETISM
RAMAN EFFECT
SUPERCONDUCTORS
TRANSITION ELEMENTS