Local defect in a magnet with long-range interactions
| dc.creator | Hoyos, J. A. | |
| dc.creator | Vojta, Thomas | |
| dc.date | 2006-10-31 | |
| dc.date | 2007-04-06 | |
| dc.date.accessioned | 2026-07-07T07:55:22Z | |
| dc.date.available | 2026-07-07T07:55:22Z | |
| dc.description | We investigate a single defect coupling to the square of the order parameter in a nearly critical magnet with long-range spatial interactions of the form $r^{-(d+σ)}$, focusing on magnetic droplets nucleated at the defect while the bulk system is in the paramagnetic phase. Because of the long-range interaction, the droplet develops a power-law tail which is energetically unfavorable. However, as long as $σ>0$, the tail contribution to the droplet free energy is subleading in the limit of large droplets; and the free energy becomes identical to the case of short-range interactions. We also study the droplet quantum dynamics with and without dissipation; and we discuss the consequences of our results for defects in itinerant quantum ferromagnets. | |
| dc.description | 8 pages, 5 eps figures, final version, as published | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0611001 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0611001 | |
| dc.identifier | Phys. Rev. B 75, 104418 (2007) | |
| dc.identifier | doi:10.1103/PhysRevB.75.104418 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/126944 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Disordered Systems and Neural Networks | |
| dc.title | Local defect in a magnet with long-range interactions | |
| dc.type | text |