Indirect exchange coupling between localized magnetic moments in carbon nanotubes: a dynamic approach
| dc.creator | Costa, A. T. | |
| dc.creator | Muniz, R. B. | |
| dc.creator | Ferreira, M. S. | |
| dc.date | 2008-02-29 | |
| dc.date.accessioned | 2026-07-07T09:24:14Z | |
| dc.date.available | 2026-07-07T09:24:14Z | |
| dc.description | Magnetic moments dilutely dispersed in a metallic host tend to be coupled through the conduction electrons of the metal. This indirect exchange coupling, known to occur for a variety of magnetic materials embedded in several different metallic structures, is of rather long range, especially for low-dimensional structures like carbon nanotubes. Motivated by recent claims that the indirect coupling between magnetic moments in precessional motion has a much longer range than its static counterpart, here we consider how magnetic atoms adsorbed to the walls of a metallic nanotube respond to a time-dependent perturbation that induces their magnetic moments to precess. By calculating the frequency-dependent spin susceptibility we are able to identify resonant peaks whose respective widths provide information about the dynamic aspect of the indirect exchange coupling. We show that by departing from a purely static representation to another in which the moments are allowed to precess, we change from what is already considered a long range interaction to another whose range is far superior. In other words, localized magnetic moments embedded in a metallic structure can feel each other's presence more easily when they are set in precessional motion. We argue that such an effect can have useful applications leading to large-scale spintronics devices. | |
| dc.description | 7 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/0803.0028 | |
| dc.identifier | http://arxiv.org/abs/0803.0028 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/156022 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Indirect exchange coupling between localized magnetic moments in carbon nanotubes: a dynamic approach | |
| dc.type | text |