| Autor: |
Micchi, Gianluca, Avriller, Rémi, Pistolesi, Fabio |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 115, 206802 (2015) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.115.206802 |
| Popis: |
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. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
