Donarini, Andrea and Yar, Abdullah and Grifoni, Milena (2012) Spectrum and Franck--Condon factors of interacting suspended single-wall carbon nanotubes. New J. Phys. 14, 023045.
A low-energy theory of suspended carbon nanotube quantum dots in weak tunnelling coupling with metallic leads is presented. The focus is on the dependence of the spectrum and the Franck–Condon factors on the geometry of the junction including several vibronic modes. The relative size and the relative position of the dot and its associated vibrons strongly influence the electromechanical properties of the system. A detailed analysis of the complete parameters space reveals different regimes: in the short vibron regime the tunnelling of an electron into the nanotube generates a plasmon–vibron excitation, whereas in the long vibron regime polaron excitations dominate the scenario. The small, position-dependent Franck–Condon couplings of the small vibron regime convert into uniform, large couplings in the long vibron regime. Selection rules for the excitations of the different plasmon–vibron modes via electronic tunnelling events are also derived.
|Date:||20 February 2012|
|Institutions:||Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni|
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen, GRK 1570, Elektronische Eigenschaften von Nanostrukturen auf Kohlenstoff-Basis|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||23 Feb 2012 06:35|
|Last Modified:||29 Oct 2012 09:51|