Spin-Dynamical Analysis of Supercell Spin Configurations
| dc.creator | Goodwin, Andrew L. | |
| dc.creator | Dove, Martin T. | |
| dc.creator | Tucker, Matthew G. | |
| dc.creator | Keen, David A. | |
| dc.date | 2006-01-25 | |
| dc.date | 2006-06-15 | |
| dc.date.accessioned | 2026-07-07T06:57:46Z | |
| dc.date.available | 2026-07-07T06:57:46Z | |
| dc.description | A model-independent approach capable of extracting spin-wave frequencies and displacement vectors from ensembles of supercell spin configurations is presented. The method is appropriate for those systems whose spin-dynamical motion is well characterised by small-amplitude fluctuations that give harmonic spin waves. First, the the spin-dynamical matrix is described and its eigenvalues shown to correspond to the spin-wave mode frequencies. The generalised spin coordinate matrix - a quantity that may be calculated from the observed spin orientations in an ensemble of spin configurations - is then introduced and its relationship to the spin-dynamical matrix established. Its eigenvalues are subsequently shown to be related to the spin-wave mode frequencies, allowing the extraction of spin-wave dispersion curves from configurational ensembles. Finally, a quantum-mechanical derivation of the same results is given, and the method applied as a case study to spin Monte-Carlo configurations of a 3D Heisenberg ferromagnet. | |
| dc.description | 10 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0601559 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0601559 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/107095 | |
| dc.subject | Other Condensed Matter | |
| dc.title | Spin-Dynamical Analysis of Supercell Spin Configurations | |
| dc.type | text |