Abstract
We consider electron transport through a quantum dot described by the Kondo model in the regime of large transport voltage in the presence of a magnetic field with . The electric current and the local magnetization are found to be universal functions of and , where is the equilibrium Kondo temperature. We present a generalization of the perturbative renormalization group to frequency dependent coupling functions, as necessitated by the structure of bare perturbation theory. We calculate and within a poor man’s scaling approach and find excellent agreement with experiment.
- Received 22 February 2002
DOI:https://doi.org/10.1103/PhysRevLett.90.076804
©2003 American Physical Society