Inelastic scattering from quantum impurities
arXiv:cond-mat/0703294 · doi:10.1016/j.physe.2007.05.010
Abstract
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 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 , and a quasi-linear regime appears in the energy range , 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.
Review submitted to the proceedings of the conference DECONS 2006
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