Flow-Equation Method for a Superconductor with Magnetic Correlations |
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| Authors: | C. P. Moca M. Crisan I. Tifrea |
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| Affiliation: | (1) Department of Physics, University of Oradea, Romania;(2) Department of Theoretical Physics, University of Cluj, 3400 Cluj, Romania |
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| Abstract: | The flow equation method has been used to calculate the energy of single impurity in a superconductor for the Anderson model with U 0. We showed that the energy of the impurity depends only on the 
R
2
(renormalized order parameter), which depends on the renormalized Hubbard repulsion U
R. For a strong Hubbard repulsion U
R = U and R = I the effect of the s–d interactions are nonrelevant, a result that is expected for this model. |
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| Keywords: | 2D superconductors flow equations magnetic correlations |
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