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Flow-Equation Method for a Superconductor with Magnetic Correlations

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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 Δ 2R (renormalized order parameter), which depends on the renormalized Hubbard repulsion U R. For a strong Hubbard repulsion U R = U and ΔR = ΔI the effect of the s–d interactions are nonrelevant, a result that is expected for this model.

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Authors and Affiliations

  1. Department of Physics, University of Oradea, Romania

    C. P. Moca

  2. Department of Theoretical Physics, University of Cluj, 3400, Cluj, Romania

    M. Crisan & I. Tifrea

Authors
  1. C. P. Moca
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  2. M. Crisan
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  3. I. Tifrea
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Moca, C.P., Crisan, M. & Tifrea, I. Flow-Equation Method for a Superconductor with Magnetic Correlations. Journal of Superconductivity 11, 719–721 (1998). https://doi.org/10.1023/A:1022637022219

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  • DOI: https://doi.org/10.1023/A:1022637022219

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