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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.51: Poster

Freitag, 4. März 2005, 14:00–18:00, Poster TU C

Noise-assisted tunneling in a quantum dot: high-frequency shot noise measurement of a quantum point contact — •Udo Hartmann², Franck Balestro¹, Eugen Onac¹, Laurens W. van Beveren¹, Ronald Hanson¹, Yuli V. Nazarov¹, and Leo P. Kouwenhoven¹ — ¹Kavli Institute of Nanoscience Delft and ERATO Mesoscopic Correlation Project, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands — ²Physics Department and CeNS, Ludwig-Maximilians-Universität München, Theresienstr. 37, 80333 München, Germany

We measured tunneling through a quantum dot (QD) induced by shot noise of a quantum point contact (QPC). The influence of the bias voltage through the QPC and the transmission of it have been explored.

We provide a theoretical model based on the description of photon-assisted tunneling (PAT). In contrast to PAT, we do not describe the environment of the QD as a continuous wave source (e.g. a microwave) of irradiation. Instead, we apply a temperature-dependent P(E) theory to calculate tunneling rates through the QD.