Open AccessDependence of electronic-transport sensitivity on the coupling between single molecule and atomic-chain electrode
Author(s) -
Liguang Wang,
Lei Chen,
Yu Ding-Wen,
Yong Li,
K S W Terence
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.6526
Subject(s) - coupling (piping) , electrode , materials science , coupling strength , transmission (telecommunications) , molecule , electron transport chain , sensitivity (control systems) , energy (signal processing) , chain (unit) , atomic physics , chemical physics , molecular physics , physics , condensed matter physics , chemistry , electronic engineering , telecommunications , computer science , quantum mechanics , biochemistry , engineering , metallurgy
The electronic transport sensitivity depending on the coupling interface between a phenalenyl molecule and atomic chain lead in three-electrode single-molecular device is theoretically modeled and studied using self-consistent tight-binding method. Electronic transmission probabilities are obtained by changing the hopping integral on the interface. The result shows that the electron transmission probability lowers as the coupling strength becomes weak. Not only the transmission probability shows high peaks, but also the transmission energy bands become wider as the coupling strength increases. A novel property of the symmetrical three-electrode phenalenyl molecule device acting as a good plus-minus energy switch without source is discovered.