Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 24: Nanomechanics

TT 24.6: Vortrag

Mittwoch, 28. März 2012, 10:45–11:00, H 3005

Single-wall carbon nanotubes as nano-electromechanical resonators — Daniel Schmid, Peter Stiller, Sabine Kugler, Christoph Strunk, and •Andreas K. Hüttel — Institute for Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany

Nano-electromechanical systems realized with carbon nanotubes display outstanding both electronical and mechanical properties. We present measurements on strong coupling between single electron tunneling and mechanical motion of a carbon nanotube quantum dot. The ultra-clean, freely suspended carbon nanotube in the few carrier limit is coupled to superconducting leads. Transport measurements show the transition from strong Coulomb blockade to the Kondo regime on the electron conduction side and from Coulomb blockade to Fabry-Perot interference on the hole conduction side. Connected to these different coupling strengths, we examine the behavior of the resonance frequency of the mechanical motion, detected via dc-current measurements.