Resonant magnetoresistance in organic spin-valves
| dc.creator | Rocha, Alexandre Reily | |
| dc.creator | Sanvito, Stefano | |
| dc.date | 2006-10-31 | |
| dc.date.accessioned | 2026-07-07T07:27:45Z | |
| dc.date.available | 2026-07-07T07:27:45Z | |
| dc.description | We investigate theoretically the effects of surface states over the magnetoresistance of Ni-based organic spin-valves. In particular we perform {\it ab initio} electronic transport calculations for a benzene-thiolate molecule chemically attached to a Ni [001] surface and contacted either by Te to another Ni [001] surface, or terminated by a thiol group and probed by a Ni STM tip. In the case of S- and Te-bonded molecules we find a large asymmetry in the spin-currents as a function of the bias, although the $I$-$V$ is rather symmetric. This leads to a smooth although not monotonic dependence of the magnetoresistance over the bias. In contrast, in the case of a STM-type geometry we demonstrate that the spin-current and the magnetoresistance can be drastically changed with bias. This is the result of a resonance between a spin-polarized surface state of the substrate and the $d$-shell band-edge of the tip. | |
| dc.description | 6 pages, 5 figures, http://www.smeagol.tcd.ie | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0610866 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0610866 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/117487 | |
| dc.subject | Materials Science | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Resonant magnetoresistance in organic spin-valves | |
| dc.type | text |