Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 54: Transport: Carbon Nanotubes
TT 54.10: Vortrag
Mittwoch, 9. März 2016, 17:45–18:00, H22
Shot noise of excited states in a CNT quantum dot — •Daniel Steininger, Nicola Paradiso, Michael Schafberger, Michael Niklas, Milena Grifoni, and Christoph Strunk — University of Regensburg
Shot noise experiments are a fundamental tool for studying the correlation between carriers in mesoscopic devices. The study of fluctuations provides information that is not accessible by current measurements alone. Here we report on simultaneous measurements of shot noise and conductance of carbon nanotube quantum dots. The high sensitivity of our setup (of the order of 10−29 A2/Hz) allows us to observe the change in the shot noise induced by each CNT excited states. The experimental results are discussed in light of a theory accounting for shot noise effects in the sequential tunnelling limit. In addition we investigate the shot noise in regions of the stability diagram with negative differential conductance.