Observation of Quantum Oscillations in the Photo-assisted Shot Noise of
a Tunnel Junction
release_tte6tavfwrgr7lwwt4n3rdzlaq
by
Gabriel Gasse,
Lafe Spietz,
Christian Lupien,
Bertrand Reulet
2013
Abstract
We report measurements of the low frequency current fluctuations of a tunnel
junction placed at very low temperature biased by a time-dependent voltage
V(t)=V(1+cos 2πν t). We observe that the excess noise generated by the
ac excitation exhibits quantum oscillations as a function of the dc bias, with
a period given by hν/e with e the charge of a single electron. This is a
direct consequence of the quantum nature of electricity in a normal conductor.
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