Inelastic scattering from quantum impurities

✍ Scribed by Gergely Zaránd; László Borda

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 374 KB
• Volume: 40
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.05.010

✦ Synopsis

We review the non-perturbative theoretical framework set up recently to compute the inelastic scattering cross section from quantum impurities [G. Zara´nd, L. Borda, J. von Delft and N. Andrei, Phys. Rev. Lett. 93 (2004) 107204] and show how it can be applied to a number of quantum impurity models. We first use this method for the S ¼ 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 T K , and a quasilinear regime appears in the energy range 0:05 T K ooo0:5 T K , 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.