Suppression of the Kondo Effect in a Quantum Dot by Microwave Radiation

Jeroen M. Elzerman; Silvano De Franceschi; David Goldhaber-Gordon; Wilfred G. van der Wiel; Leo P. Kouwenhoven

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Suppression of the Kondo Effect in a Quantum Dot by Microwave Radiation

Jeroen M. Elzerman·Silvano De Franceschi·David Goldhaber-Gordon·Wilfred G. van der Wiel·Leo P. Kouwenhoven

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Abstract

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.

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Jeroen M. Elzerman, Silvano De Franceschi, David Goldhaber-Gordon, Wilfred G. van der Wiel, Leo P. Kouwenhoven. 1999-12-08. Suppression of the Kondo Effect in a Quantum Dot by Microwave Radiation. https://arxiv.org/abs/cond-mat/9912126

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