Vibrational instability due to coherent tunneling of electrons
Department of Applied Physics, Chalmers University of
Technology and Göteborg University - SE-412 96
Corresponding author: firstname.lastname@example.org
Accepted: 21 January 2002
Effects of a coupling between the mechanical vibrations of a quantum dot placed between the two leads of a single-electron transistor and coherent tunneling of electrons through a single level in the dot has been studied. We have found that for bias voltages exceeding a certain critical value a dynamical instability occurs and mechanical vibrations of the dot develop into a stable limit cycle. The current-voltage characteristics for such a transistor were calculated and they seem to be in reasonably good agreement with recent experimental results for the single--molecule transistor by Park et al. (Nature 407 (2000) 57).
PACS: 73.63.-b – Electronic transport in mesoscopic or nanoscale materials and structures / 73.23.Hk – Coulomb blockade; single-electron tunneling / 85.85.+j – Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
© EDP Sciences, 2002