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https://repositorio.ufba.br/handle/ri/13655
metadata.dc.type: | Artigo de Periódico |
Title: | Raman scattering of hght off a superconducting alloy containing paramagnetic impurities |
Other Titles: | Physical Review B |
Authors: | Cuden, C. B. Ramos, A. da. S. |
metadata.dc.creator: | Cuden, C. B. Ramos, A. da. S. |
Abstract: | 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. |
Publisher: | Physical Review B |
URI: | http://repositorio.ufba.br/ri/handle/ri/13655 |
Issue Date: | 1979 |
Appears in Collections: | Artigo Publicado em Periódico (FIS) |
Files in This Item:
File | Description | Size | Format | |
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88888888888888888888.pdf_3 | 646,21 kB | Adobe PDF | View/Open |
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