DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2005 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

TT: Tiefe Temperaturen

TT 37: Transport - Fluctuations and Noise

TT 37.1: Talk

Wednesday, March 9, 2005, 10:15–10:30, TU H3027

High-frequency shot noise measurement of a quantum point contact — •Udo Hartmann1, Franck Balestro2, Eugen Onac2, Laurens W. van Beveren2, Ronald Hanson2, Yuli V. Nazarov2, and Leo P. Kouwenhoven21Physics Department and CeNS, Ludwig-Maximilians-Universität München, Theresienstr. 37, 80333 München, Germany — 2Kavli Institute of Nanoscience Delft and ERATO Mesoscopic Correlation Project, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands

We present an experimental realisation of a quantum dot (QD) high-frequency noise detector that measures the current shot noise produced by a nearby quantum point contact (QPC) by means of noise-assisted tunnelling. We investigate the dependence of the detector signal on the voltage across the QPC and on the QPC transmissions which is consistent with previous low-frequency measurements [1,2]. We observe and explain the saturation and quantum features in the detector signal.

[1] Y. P. Li, et al., Appl. Phys. Lett. 57, 774 (1990).

[2] A. Kumar et al., Phys. Rev. Lett. 76, 2778 (1996).

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2005 > Berlin