We have studied the influence of microwave radiation on the transport properties of a semiconductor quantum dot in the Kondo regime. In the entire frequency range tested (10--50 GHz), the Kondo resonance vanishes by increasing the microwave power. This suppression of the Kondo resonance shows an unexpected scaling behavior. No evidence for photon-sideband formation is found. The comparison with temperature-dependence measurements indicates that radiation-induced spin dephasing plays an important role in the suppression of the Kondo effect.
@article{arxiv.cond-mat/9912126,
title = {Suppression of the Kondo Effect in a Quantum Dot by Microwave Radiation},
author = {Jeroen M. Elzerman and Silvano De Franceschi and David Goldhaber-Gordon and Wilfred G. van der Wiel and Leo P. Kouwenhoven},
journal= {arXiv preprint arXiv:cond-mat/9912126},
year = {2007}
}