Magnetic Correlations at Graphene Edges
| dc.creator | Yazyev, Oleg V. | |
| dc.creator | Katsnelson, M. I. | |
| dc.date | 2007-11-01 | |
| dc.date.accessioned | 2026-07-07T08:57:13Z | |
| dc.date.available | 2026-07-07T08:57:13Z | |
| dc.description | Magnetic zigzag edges of graphene are considered as a basis for novel spintronics devices despite the fact that no true long-range magnetic order is possible in one dimension. We study the transverse and longitudinal fluctuations of magnetic moments at zigzag edges of graphene from first principles. We find a high value for the spin wave stiffness $D$ = 2100 meV Å$^2$ and a spin-collinear domain wall creation energy $E_dw$ = 114 meV accompanied by low magnetic anisotropy. Above the crossover temperature $T_x \approx$10 K the spin correlation length $ξ\propto T^{-1}$ limits the long-range magnetic order to ~1 nm at 300 K while below $T_x$ it grows exponentially with decreasing temperature. We discuss possible ways of increasing the range of magnetic order and effects of edge roughness on it. | |
| dc.description | 4 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0711.0207 | |
| dc.identifier | http://arxiv.org/abs/0711.0207 | |
| dc.identifier | Phys. Rev. Lett. 100, 047209 (2008) | |
| dc.identifier | doi:10.1103/PhysRevLett.100.047209 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/146885 | |
| dc.subject | Materials Science | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Magnetic Correlations at Graphene Edges | |
| dc.type | text |