Title of article :
The role of impurities on the properties of electron transport through the metal/trans-PA/metal system: Greenʹs function approach
Author/Authors :
M. Ashhadi، نويسنده , , S.A. Ketabi، نويسنده , , N. Shahtahmasebi، نويسنده , , D. Vahedi Fakhrabad، نويسنده , , M. Askari، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2010
Pages :
5
From page :
924
To page :
928
Abstract :
In this work, we present a theoretical study on the conductance of trans-polyacetylene (trans-PA) nanowire in the presence of impurities and use of trans-PA as a molecular bridge sandwiched between two semi-infinite metallic electrodes with a simple cubic structure and square cross section. We use a tight-binding Hamiltonian model within the framework of a generalized Greenʹs function technique and rely on the Landauer–Bütikker formalism as the basis for studying the current–voltage characteristic of this system. Our calculations indicate that the presence of impurities gives rise to significant enhancement in the density of states within the bandgap and large enhancement in conductance and the current–voltage characteristic. Also our results show that the electronic properties of the system are sensitive to the molecule-to-impurity coupling strength.
Journal title :
Physica E Low-dimensional Systems and Nanostructures
Serial Year :
2010
Journal title :
Physica E Low-dimensional Systems and Nanostructures
Record number :
1048660
Link To Document :
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