Volume 15, Issue 1 (Iranian Journal of Physics Research,Winter 2015)                   IJPR 2015, 15(1): 89-95 | Back to browse issues page


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Rabani H, Mardaani M, Talebi M. Electronic transport of molecular nanowires by considering of electron hopping energy between the second neighbors . IJPR. 2015; 15 (1) :89-95
URL: http://ijpr.iut.ac.ir/article-1-1788-en.html
Department of Physics, Faculty of Science, Shahrekord University, P. O. Box 115, Shahrekord, Iran , rabani-h@sci.sku.ac.ir
Abstract:   (4146 Views)
In this paper, we study the electronic conductance of molecular nanowires by considering the electron hopping between the first and second neighbors with the help Green’s function method at the tight-binding approach. We investigate three types of structures including linear uniform and periodic chains as well as poly(p-phenylene) molecule which are embedded between two semi-infinite metallic leads. The results show that in the second neighbor approximation, the resonance, anti-resonance and Fano phenomena occur in the conductance spectra of these structures. Moreover, a new gap is observed at edge of the lead energy band wich its width depends on the value of the electron hopping energy between the second neighbors. In the systems including intrinsic gap, this hopping energy shifts the gap in the energy spectra.
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Type of Study: Research | Subject: General

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