Koller, Sonja and Mayrhofer, Leonhard and Grifoni, Milena (2010) Spin-dependent transport through interacting graphene armchair nanoribbons. NEW JOURNAL OF PHYSICS, 12: 033038. ISSN 1367-2630,
Full text not available from this repository. (Request a copy)Abstract
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-range 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 in 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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NANOTUBE QUANTUM DOTS; CARBON NANOTUBES; EDGE; GRAPHITE; STATES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Aug 2020 10:30 |
| Last Modified: | 03 Aug 2020 10:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/24963 |
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