Evidence for deconfined quantum criticality in a two-dimensional Heisenberg model with four-spin interactions
| dc.creator | Sandvik, Anders W. | |
| dc.date | 2006-11-13 | |
| dc.date | 2007-07-28 | |
| dc.date.accessioned | 2026-07-07T08:20:33Z | |
| dc.date.available | 2026-07-07T08:20:33Z | |
| dc.description | Using ground-state projector quantum Monte Carlo simulations in the valence bond basis, it is demonstrated that non-frustrating four-spin interactions can destroy the Neel order of the two-dimensional S=1/2 Heisenberg antiferromagnet and drive it into a valence-bond solid (VBS) phase. Results for spin and dimer correlations are consistent with a single continuous transition, and all data exhibit finite-size scaling with a single set of exponents; z=1, nu=0.78 +/- 0.03, and eta=0.26 +/- 0.03. The unusually large eta and an emergent U(1) symmetry, detected using VBS order parameter histograms, provide strong evidence for a deconfined quantum critical point. | |
| dc.description | 4 pages, 5 figures. v2: typo in Fig. 2 corrected. v3: minor changes, published version | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0611343 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0611343 | |
| dc.identifier | Phys. Rev. Lett. 98, 227202 (2007) | |
| dc.identifier | doi:10.1103/PhysRevLett.98.227202 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/135102 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Superconductivity | |
| dc.title | Evidence for deconfined quantum criticality in a two-dimensional Heisenberg model with four-spin interactions | |
| dc.type | text |