Impurity spin textures across conventional and deconfined quantum critical points of two-dimensional antiferromagnets
| dc.creator | Metlitski, Max A. | |
| dc.creator | Sachdev, Subir | |
| dc.date | 2007-03-29 | |
| dc.date.accessioned | 2026-07-07T08:25:56Z | |
| dc.date.available | 2026-07-07T08:25:56Z | |
| dc.description | We describe the spin distribution in the vicinity of a non-magnetic impurity in a two-dimensional antiferromagnet undergoing a transition from a magnetically ordered Neel state to a paramagnet with a spin gap. The quantum critical ground state in a finite system has total spin S=1/2 (if the system without the impurity had an even number of S=1/2 spins), and recent numerical studies in a double layer antiferromagnet (K. H.Hoglund et al., cond-mat/0611418) have shown that the spin has a universal spatial form delocalized across the entire sample. We present the field theory describing the uniform and staggered magnetizations in this spin texture for two classes of antiferromagnets: (i) the transition from a Neel state to a paramagnet with local spin singlets, in models with an even number of S=1/2 spins per unit cell, which are described by a O(3) Landau-Ginzburg-Wilson field theory; and (ii) the transition from a Neel state to a valence bond solid, in antiferromagnets with a single S=1/2 spin per unit cell, which are described by a deconfined field theory of spinons. | |
| dc.description | 30 pages, 9 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0703790 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0703790 | |
| dc.identifier | Physical Review B 76, 064423 (2007) | |
| dc.identifier | doi:10.1103/PhysRevB.76.064423 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/136787 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.title | Impurity spin textures across conventional and deconfined quantum critical points of two-dimensional antiferromagnets | |
| dc.type | text |