Flow-equation method for a superconductor with magnetic correlations

Authors
Moca, CP Crisan, M Tifrea, I
Citation
Cp. Moca et al., Flow-equation method for a superconductor with magnetic correlations, J SUPERCOND, 11(6), 1998, pp. 719-721
Citations number
4
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF SUPERCONDUCTIVITY
ISSN journal
08961107 → ACNP
Volume
11
Issue
6
Year of publication
1998
Pages
719 - 721
Database
ISI
SICI code
0896-1107(199812)11:6<719:FMFASW>2.0.ZU;2-Q
Abstract
The flow equation method has been used to calculate the energy of single im purity in a superconductor for the Anderson model with U not equal 0. We sh owed that the energy of the impurity depends only on the Delta(R)(2) (renor malized order parameter), which depends on the renormalized Hubbard repulsi on UR. For a strong Hubbard repulsion U-R = U and Delta(R) = Delta' the eff ect of the s-d interactions are nonrelevant, a result that is expected for this model.