Ordered droplets in quantum magnets with long-range interactions
| dc.creator | Vojta, Thomas | |
| dc.creator | Hoyos, Jose A | |
| dc.date | 2007-03-21 | |
| dc.date | 2008-03-04 | |
| dc.date.accessioned | 2026-07-07T09:24:25Z | |
| dc.date.available | 2026-07-07T09:24:25Z | |
| dc.description | A defect coupling to the square of the order parameter in a nearly quantum-critical magnet can nucleate an ordered droplet while the bulk system is in the paramagnetic phase. We study the influence of long-range spatial interactions of the form $r^{-(d+σ)}$ on the droplet formation. To this end, we solve a Landau-Ginzburg-Wilson free energy in saddle point approximation. The long-range interaction causes the droplet to develop an energetically unfavorable power-law tail. However, for $σ>0$, the free energy contribution of this tail is subleading in the limit of large droplets; and the droplet formation is controlled by the defect bulk. Thus, for large defects, long-range interactions do not hinder the formation of droplets. | |
| dc.description | 2 pages, 3 eps figures, final version as published | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0703555 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0703555 | |
| dc.identifier | Physica B 403, 1239 (2008) | |
| dc.identifier | doi:10.1016/j.physb.2007.10.252 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/156088 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Disordered Systems and Neural Networks | |
| dc.title | Ordered droplets in quantum magnets with long-range interactions | |
| dc.type | text |