Julien Basset, Alik Kasumov, Pascu Moca, Gergely Zarand, Pascal Simon, Helene Bouchiat, Richard Deblock
The current emission noise of a carbon nanotube quantum dot in the Kondo
regime is measured at frequencies $\nu$ of the order or higher than the
frequency associated with the Kondo effect $k_B T_K/h$, 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 $h \nu \approx k_B T_K$ a Kondo effect related singularity at a
voltage bias $eV \approx h \nu $, and a strong reduction of this singularity
for $h \nu \approx 3 k_B T_K$, in good agreement with theory. Our experiment
constitutes a new original tool for the investigation of the non-equilibrium
dynamics of many-body phenomena in nanoscale devices.
View original:
http://arxiv.org/abs/1110.1570
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