Journal of Magnetism and Magnetic Materials, ( ISI ), Volume (367), No (1), Year (2014-10) , Pages (81-85)

Title : ( Spin dependent transport through triangular graphene quantum dot in the presence of Rashba type spin–orbit coupling )

Authors: Sayyed Mohsen Modarresi Saryazdi , B.S. Kandemir , Mahmood Rezaee Roknabadi , Nasser Shahtahmassebi ,

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Electronic, magnetic and transport properties of a triangle graphene quantum dot have been studied in the presence of Rashba type spin–orbit coupling. The non-interacting part is written in the tight-binding model, and we use the Kene–Mele–Hubbard (KMH) Hamiltonian to describe the electron–electron and the Rashba spin–orbit interaction. While the Hubbard term split the spin up and down states, the Rashba term mixed these states. The competition between these two effects produces an interesting situation in a nano-device. Our results indicate that the magnetization of zigzag edge and spin coherence are decreased due to the Rashba spin–orbit interaction in the triangle graphene quantum dot. It is shown that the reduction of spin coherence is non-negligible even in the case of weak Rashba spin–orbit interaction.

Keywords

, Graphene quantum dot; Rashba spin, orbit; Green’s
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@article{paperid:1042708,
author = {Modarresi Saryazdi, Sayyed Mohsen and B.S. Kandemir and Rezaee Roknabadi, Mahmood and Shahtahmassebi, Nasser},
title = {Spin dependent transport through triangular graphene quantum dot in the presence of Rashba type spin–orbit coupling},
journal = {Journal of Magnetism and Magnetic Materials},
year = {2014},
volume = {367},
number = {1},
month = {October},
issn = {0304-8853},
pages = {81--85},
numpages = {4},
keywords = {Graphene quantum dot; Rashba spin-orbit; Green’s function},
}

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%0 Journal Article
%T Spin dependent transport through triangular graphene quantum dot in the presence of Rashba type spin–orbit coupling
%A Modarresi Saryazdi, Sayyed Mohsen
%A B.S. Kandemir
%A Rezaee Roknabadi, Mahmood
%A Shahtahmassebi, Nasser
%J Journal of Magnetism and Magnetic Materials
%@ 0304-8853
%D 2014

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