Inelastic scattering from quantum impurities

详细信息	查看全文 | 推荐本文 |

• 作者：Gergely Zar&#xe1 ; nd ; L&#xe1 ; szló ; Borda
• 关键词：Inelastic scattering ; Dephasing ; Kondo effect
• 刊名：Physica E
• 出版年：2007
• 期刊代码：139_13869477
• 类别：et
• 出版时间：October 2007
• 卷：40
• 期：1
• 页码：5-11
• 文件大小：373 K

摘要

We review the non-perturbative theoretical framework set up recently to compute the inelastic scattering cross section from quantum impurities [G. Zaránd, 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 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 , 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.