Abstract
We calculate the dephasing rate due to magnetic impurities in a weakly disordered metal as measured in a weak-localization experiment. If the density of magnetic impurities is sufficiently low, the dephasing rate is a universal function, , where is the Kondo temperature and is the density of states. We show that inelastic vertex corrections with a typical energy transfer are suppressed by powers of . Therefore, the dephasing rate can be calculated from the inelastic cross section proportional to , where is the matrix which is evaluated numerically exactly using the numerical renormalization group.
- Received 12 October 2005
DOI:https://doi.org/10.1103/PhysRevLett.96.226601
©2006 American Physical Society