Open AccessQuantum transport of four-terminal nano-molecular bridge
Author(s) -
Liguang Wang,
Yong Li,
Yu Ding-Wen,
Jun Wang
Publication year - 2005
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.54.233
Subject(s) - molecular orbital , physics , quantum , transmission coefficient , tight binding , atomic orbital , terminal (telecommunication) , molecular wire , transmission (telecommunications) , atom (system on chip) , bridge (graph theory) , molecule , electron , molecular physics , atomic physics , electronic structure , condensed matter physics , quantum mechanics , computer science , telecommunications , medicine , embedded system
The characteristics of quantum transmission through a four-terminal nano-molecular bridge are investigated theoretically by using tight-binding approach, based on the Green's function with only a π orbital per carbon atom at the site. The transmission probabilities of the electrons transported through the molecular bridge to every terminal are obtained. The electronic current distributions inside the molecular bridge are calculated and shown in graphical analogy by the current density method and Fisher-Lee formulism at the energy points E=±12 and E=±149 where transmission probabilities show peaks, the maximum bond currents are also presented. It is found that the loop currents in molecules are induced by the phase difference of the molecular orbitals.