Article (Scientific journals)
Charge pumping in strongly-coupled molecular quantum dots
Haughian, Patrick; Yap, Han Hoe; Gong, Jiangbin
2017In Physical Review. B, 96 (19), p. 195432
Peer reviewed
 

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Keywords :
Nanomechanics; Mesoscopic physics; Quantum transport
Abstract :
[en] The interaction between electrons and the vibrational degrees of freedom of a molecular quantum dot can lead to an exponential suppression of the conductance, an effect which is commonly termed Franck-Condon blockade. Here, we investigate this effect in a quantum dot driven by time-periodic gate voltages and tunneling amplitudes using nonequilibrium Green's functions and a Floquet expansion. Building on previous results showing that driving can lift the Franck-Condon blockade, we investigate driving protocols which can be used to pump charge across the quantum dot. In particular, we show that due to the strongly coupled nature of the system, the pump current at resonance is an exponential function of the drive strength.
Disciplines :
Physics
Author, co-author :
Haughian, Patrick ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Yap, Han Hoe;  National University of Singapore > Department of Physics
Gong, Jiangbin;  National University of Singapore > Department of Physics
External co-authors :
yes
Language :
English
Title :
Charge pumping in strongly-coupled molecular quantum dots
Publication date :
November 2017
Journal title :
Physical Review. B
Volume :
96
Issue :
19
Pages :
195432
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
FnR Project :
FNR7556175 - Modern Mesoscopic Systems And Applications In Nanoelectronics And Spintronics, 2014 (01/02/2015-31/07/2021) - Thomas Schmidt
Funders :
FNR - Fonds National de la Recherche [LU]
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since 18 December 2017

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