The current emission noise of a carbon nanotube quantum dot in the Kondo regime is measured at frequencies ν of the order or higher than the frequency associated with the Kondo effect k BT K/h, with T K the Kondo temperature. The carbon nanotube is coupled via an on-chip resonant circuit to a quantum noise detector, a superconductor- insulator-superconductor junction. We find for hνk BT K a Kondo effect related singularity at a voltage bias eVhν, and a strong reduction of this singularity for hν3k BT K, in good agreement with theory. Our experiment constitutes a new original tool for the investigation of the nonequilibrium dynamics of many-body phenomena in nanoscale devices.
ASJC Scopus subject areas
- Physics and Astronomy(all)