Dimerized phase and transitions in a spatially anisotropic square lattice antiferromagnet
| dc.creator | Starykh, Oleg A. | |
| dc.creator | Balents, Leon | |
| dc.date | 2004-02-03 | |
| dc.date.accessioned | 2026-07-07T07:47:54Z | |
| dc.date.available | 2026-07-07T07:47:54Z | |
| dc.description | We investigate the spatially anisotropic square lattice quantum antiferromagnet. The model describes isotropic spin-1/2 Heisenberg chains (exchange constant J) coupled antiferromagnetically in the transverse (J_\perp) and diagonal (J_\times), with respect to the chain, directions. Classically, the model admits two ordered ground states -- with antiferromagnetic and ferromagnetic inter-chain spin correlations -- separated by a first order phase transition at J_\perp=2J_\times. We show that in the quantum model this transition splits into two, revealing an intermediate quantum-disordered columnar dimer phase, both in two dimensions and in a simpler two-leg ladder version. We describe quantum-critical points separating this spontaneously dimerized phase from classical ones. | |
| dc.description | 4 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0402055 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0402055 | |
| dc.identifier | Phys. Rev. Lett. 93, 127202 (2004) | |
| dc.identifier | doi:10.1103/PhysRevLett.93.127202 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/124322 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.title | Dimerized phase and transitions in a spatially anisotropic square lattice antiferromagnet | |
| dc.type | text |