Experimental Test of the High-Frequency Quantum Shot Noise Theory in a Quantum Point Contact

E. Zakka-Bajjani, J. Ségala, F. Portier, P. Roche, D. C. Glattli, A. Cavanna, and Y. Jin
Phys. Rev. Lett. 99, 236803 – Published 5 December 2007

Abstract

We report on direct measurements of the electronic shot noise of a quantum point contact at frequencies ν in the range 4–8 GHz. The very small energy scale used ensures energy independent transmissions of the few transmitted electronic modes and their accurate knowledge. Both the thermal energy and the quantum point contact drain-source voltage Vds are comparable to the photon energy hν leading to observation of the shot noise suppression when Vds<hν/e. Our measurements provide the first complete test of the finite frequency shot noise scattering theory without adjustable parameters.

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  • Received 23 April 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.236803

©2007 American Physical Society

Authors & Affiliations

E. Zakka-Bajjani, J. Ségala, F. Portier*, P. Roche, and D. C. Glattli

  • Nanoelectronic Group, Service de Physique de l’Etat Condensé, CEA Saclay, F-91191 Gif-Sur-Yvette, France

A. Cavanna and Y. Jin

  • Laboratoire de Photonique et Nanostructures, CNRS, Route de Nozay, F-91460 Marcoussis, France

  • *fabien.portier@cea.fr
  • Also at LPA, Ecole Normale Supérieure, Paris, France.

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Issue

Vol. 99, Iss. 23 — 7 December 2007

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