Spin-gap physics, ground state degeneracy, and bound states on the depleted kagome lattice
| dc.creator | Hooley, C. | |
| dc.creator | Tsvelik, A. M. | |
| dc.date | 1999-03-02 | |
| dc.date | 1999-10-20 | |
| dc.date.accessioned | 2026-07-07T03:12:56Z | |
| dc.date.available | 2026-07-07T03:12:56Z | |
| dc.description | We analyse the antiferromagnetic spin-1/2 Heisenberg model on a depleted kagome lattice, where some bonds have been reduced to exchange integral J_2 << J_1. The fully depleted system consists of 1D chains, each with a doubly degenerate singlet-pair ground state and a spectral gap (like the Majumdar-Ghosh model). There are localised and itinerant low-energy excitations. The modes from the lowest branch of excitations are incapable of lifting the 2D system's ground state degeneracy at finite J_2/J_1 << 1. Low-energy excitations of the 2D system are dominated by coherently propagating bound states of the 1D excitations. | |
| dc.description | 4 pages, including 4 figures; submitted to Phys. Rev. Lett.; references added and manuscript revised (error in gap calculation corrected and explanatory details added) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9903044 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9903044 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/29101 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Spin-gap physics, ground state degeneracy, and bound states on the depleted kagome lattice | |
| dc.type | text |