Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-10-27
New Journal of Physics 12 (2010) 033038
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
37 pages, 9 figures, 2 tables; revised published version
Scientific paper
10.1088/1367-2630/12/3/033038
We investigate spin effects in transport across fully interacting, finite size graphene armchair nanoribbons (ACNs) contacted to collinearly spin-polarized leads. In such systems, the presence of short ranged Coulomb interaction between bulk states and states localized at the ribbon ends leads to novel spin-dependent phenomena. Specifically, the total spin of the low energy many-body states is conserved during tunneling but that of the bulk and end states is not. As a consequence, in the single-electron regime, dominated by Coulomb blockade phenomena, we find pronounced negative differential conductance features for ACNs contacted to parallel polarized leads. These features are however absent for an anti-parallel contact configuration, which in turn leads within a certain gate and bias voltage region to a negative tunneling magneto-resistance. Moreover, we analyze the changes in the transport characteristics under the influence of an external magnetic field.
grifoni Milena
Koller Sonja
Mayrhofer Leonhard
No associations
LandOfFree
Spin-dependent transport through interacting graphene armchair nanoribbons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin-dependent transport through interacting graphene armchair nanoribbons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin-dependent transport through interacting graphene armchair nanoribbons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-717956