Reference : Lifting the Franck-Condon blockade in driven quantum dots
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/30177
Lifting the Franck-Condon blockade in driven quantum dots
English
Haughian, Patrick mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Walter, Stefan mailto [Friedrich-Alexander-Universität Erlangen-Nürnberg - FAU > Institut für theoretische Physik II]
Nunnenkamp, Andreas mailto [University of Cambridge > Cavendish Laboratory]
Schmidt, Thomas mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
10-Nov-2016
Physical Review. B : Condensed Matter
American Institute of Physics
94
Yes (verified by ORBilu)
International
0163-1829
1095-3795
New York
NY
[en] nanomechanics ; quantum transport ; carbon nanotubes
[en] Electron-vibron coupling in quantum dots can lead to a strong suppression of the average current in the sequential tunneling regime. This effect is known as Franck-Condon blockade and can be traced back to an overlap integral between vibron states with different electron numbers which becomes exponentially small for large electron-vibron coupling strength. Here, we investigate the effect of a time-dependent drive on this phenomenon, in particular the effect of an oscillatory gate voltage acting on the electronic dot level. We employ two different approaches: perturbation theory based on nonequilibrium Keldysh Green's functions and a master equation in Born-Markov approximation. In both cases, we find that the drive can lift the blockade by exciting vibrons. As a consequence, the relative change in average current grows exponentially with the drive strength.
Fonds National de la Recherche - FnR ; ERC OPTOMECH ; Marie Curie ITN cQOM
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/30177
10.1103/PhysRevB.94.205412
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.205412
FnR ; FNR7556175 > Thomas Schmidt > MoMeSys > Modern mesoscopic systems and applications in nanoelectronics and spintronics > 01/02/2015 > 31/01/2020 > 2014

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