Parametrization of Nambu Vertex in a Singlet Superconductor

@inproceedings{Eberlein2010ParametrizationON,
  title={Parametrization of Nambu Vertex in a Singlet Superconductor},
  author={Andreas Eberlein and Walter Metzner},
  year={2010}
}
  • Andreas Eberlein, Walter Metzner
  • Published 2010
  • Physics
  • We analyze general properties of the effective Nambu two-particle vertex and its renormalization group flow in a spin-singlet superconductor. In a fully spin-rotation invariant form the Nambu vertex can be expressed by only three distinct components. Solving exactly the flow of a mean-field model with reduced BCS and forward scattering interactions, we gain insight into the singularities in the momentum and energy dependences of the vertex at and below the critical energy scale for… CONTINUE READING

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