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Mechanical Signatures of the Current Blockade Instability in Suspended Carbon Nanotubes
Language
en
Article de revue
This item was published in
Physical Review Letters. 2015-11-13, vol. 115, n° 20, p. 206802 (1-5)
American Physical Society
English Abstract
Transport measurements allow sensitive detection of nanomechanical motion of suspended carbon nanotubes. It has been predicted that when the electro-mechanical coupling is sufficiently large a bistability with a current ...Read more >
Transport measurements allow sensitive detection of nanomechanical motion of suspended carbon nanotubes. It has been predicted that when the electro-mechanical coupling is sufficiently large a bistability with a current blockade appears. Unambiguous observation of this transition by current measurements may be difficult. Instead, we investigate the mechanical response of the system, namely the displacement spectral function; the linear response to a driving; and the ring-down behavior. We find that by increasing the electro-mechanical coupling the peak in the spectral function broadens and shifts at low frequencies while the oscillator dephasing time shortens. These effects are maximum at the transition where non-linearities dominate the dynamics. These strong signatures open the way to detect the blockade transition in devices currently studied by several groups.Read less <
English Keywords
Current Blockade
Electro-Mechanical Coupling
Single-Electron Transport
Non-Linear Effects
Ring-Down Time
NEMS
Suspended Carbon Nanotubes
ANR Project
Nano Mécanique Quantique - ANR-10-BLAN-0404
Origin
Hal imported
