2007/03/12 by Gergely Zaránd, G. Zarand, L. Borda
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1016/j.physe.2007.05.010
published as Physica E 40, 5 (2007) · Review submitted to the proceedings of the conference DECONS 2006
arxiv created 2007/03/12 · openalex publication_date 2007/05/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We review the non-perturbative theoretical framework set up recently to compute the inelastic scattering cross section from quantum impurities [G. Zaránd \it et al., Phys. Rev. Lett. \bf 93, 107204 (2004)] and show how it can be applied to a number of quantum impurity models. We first use this method for the S=1/2 single-channel Kondo model and the Anderson model. In both cases, a large plateau is found in the inelastic scattering rate for incoming energies above TK, and a quasi-linear regime appears in the energy range 0.05 TK < ω< 0.5 TK, in agreement with the experimental observations. We also present results for the 2-channel Kondo model, the prototype of all non-Fermi liquid models, and show that there half of the scattering remains inelastic even at the Fermi energy.