Title : ( A study of inelastic electron–phonon interactions on tunneling magnetoresistance of a nano-scale device )
Authors: Sayyed Mohsen Modarresi Saryazdi , Mahmood Rezaee Roknabadi , Nasser Shahtahmassebi , davoud vahedi , Hadi Arabshahi ,
Full TextAbstract
In this research, we have studied the effect of inelastic electron–phonon interactions on current–voltage characteristic and tunneling magnetoresistance of a polythiophene molecule that is sandwiched between two cobalt electrodes using modified Green’s function method as proposed by Walczak. The molecule is described with a modified Su–Schrieffer–Heeger Hamiltonian. The ground state of the molecule is obtained by Hellman–Feynman theorem. Electrodes are described in the wide-band approximation and spin-flip is neglected during conduction. Our calculation results show that with increase in voltage the currents increase and tunneling magnetoresistance decreases. Change in tunneling magnetoresistance due to inelastic interactions is limited in a small bias voltage interval and can be neglected in the other bias voltages.
Keywords
Tunneling magnetoresistance Green’s function Polythiophene Electron–phonon interaction
@article{paperid:1020428,
author = {Modarresi Saryazdi, Sayyed Mohsen and Rezaee Roknabadi, Mahmood and Shahtahmassebi, Nasser and Vahedi, Davoud and Arabshahi, Hadi},
title = {A study of inelastic electron–phonon interactions on tunneling magnetoresistance of a nano-scale device},
journal = {Physica B: Condensed Matter},
year = {2011},
volume = {406},
number = {127},
month = {January},
issn = {0921-4526},
pages = {478--481},
numpages = {3},
keywords = {Tunneling magnetoresistance
Green’s function
Polythiophene
Electron–phonon interaction},
}
%0 Journal Article
%T A study of inelastic electron–phonon interactions on tunneling magnetoresistance of a nano-scale device
%A Modarresi Saryazdi, Sayyed Mohsen
%A Rezaee Roknabadi, Mahmood
%A Shahtahmassebi, Nasser
%A Vahedi, Davoud
%A Arabshahi, Hadi
%J Physica B: Condensed Matter
%@ 0921-4526
%D 2011
