Magnetoresistance of atomic-sized contacts: an ab-initio study
| dc.creator | Bagrets, Alexei | |
| dc.creator | Papanikolaou, Nikos | |
| dc.creator | Mertig, Ingrid | |
| dc.date | 2003-03-22 | |
| dc.date | 2004-05-17 | |
| dc.date.accessioned | 2026-07-07T02:50:21Z | |
| dc.date.available | 2026-07-07T02:50:21Z | |
| dc.description | The magnetoresistance (MR) effect in metallic atomic-sized contacts is studied theoretically by means of first-principle electronic structure calculations. We consider three-atom chains formed from Co, Cu, Si, and Al atoms suspended between semi-infinite Co leads. We employ the screened Korringa-Kohn-Rostoker Green's function method for the electronic structure calculation and evaluate the conductance in the ballistic limit using the Landauer approach. The conductance through the constrictions reflects the spin-splitting of the Co bands and causes high MR ratios, up to 50%. The influence of the structural changes on the conductance is studied by considering different geometrical arrangements of atoms forming the chains. Our results show that the conductance through s-like states is robust against geometrical changes, whereas the transmission is strongly influenced by the atomic arrangement if p or d states contribute to the current. | |
| dc.description | Revised version, presentation of results is improved, figure 2 is splitted to two figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0303480 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0303480 | |
| dc.identifier | Phys. Rev. B 70, 064410 (2004) | |
| dc.identifier | doi:10.1103/PhysRevB.70.064410 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/21078 | |
| dc.subject | Materials Science | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Magnetoresistance of atomic-sized contacts: an ab-initio study | |
| dc.type | text |