Open AccessTheoretical study of inelastic current in molecularnano-junction excited by infrared field
Author(s) -
Yuan Zhang,
Luxia Wang
Publication year - 2011
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.60.047304
Subject(s) - excited state , infrared , excitation , coupling (piping) , intramolecular force , atomic physics , molecule , master equation , physics , molecular physics , materials science , optics , quantum mechanics , metallurgy , quantum
Molecular nano-junction is modeled by 'metal/single molecule/metal’ structure. With the generalized master equation method, the inelastic current induced by the sequential charge transmission through the junction is studied under the excitation of infrared fields in the case of weak lead-molecule coupling.The interaction between infrared field and molecule is described with the models of exponential coupling, square coupling, and linear coupling respectively. In the excitation of varieties of infrared fields, the inelastic current-voltage characteristics and the effects of intramolecular vibrational energy redistribution are discussed.