Even-odd effects in finite Heisenberg spin chains
| dc.creator | Politi, Paolo | |
| dc.creator | Pini, Maria Gloria | |
| dc.date | 2008-11-11 | |
| dc.date | 2008-12-24 | |
| dc.date.accessioned | 2026-07-07T12:31:53Z | |
| dc.date.available | 2026-07-07T12:31:53Z | |
| dc.description | Magnetic superlattices and nanowires may be described as Heisenberg spin chains of finite length N, where N is the number of magnetic units (films or atoms, respectively). We study antiferromagnetically coupled spins which are also coupled to an external field H (superlattices) or to a ferromagnetic substrate (nanowires). The model is analyzed through a two-dimensional map which allows fast and reliable numerical calculations. Both open and closed chains have different properties for even and odd N (parity effect). Open chains with odd N are known [S.Lounis et al., Phys. Rev. Lett. 101, 107204 (2008)] to have a ferrimagnetic state for small N and a noncollinear state for large N. In the present paper, the transition length N_c is found analytically. Finally, we show that closed chains arrange themselves in the uniform bulk spin-flop state for even N and in nonuniform states for odd N. | |
| dc.description | 4 pages. Corrected a few misprints and improved figures' legibility. Accepted for publication in Physical Review B | |
| dc.identifier | https://arxiv.org/abs/0811.1687 | |
| dc.identifier | http://arxiv.org/abs/0811.1687 | |
| dc.identifier | Phys. Rev. B 79, 012405 (2009) | |
| dc.identifier | doi:10.1103/PhysRevB.79.012405 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/216598 | |
| dc.subject | Materials Science | |
| dc.title | Even-odd effects in finite Heisenberg spin chains | |
| dc.type | text |