Critical and Massive Phases in Spin Chains and Spin Ladders |
| J. Sólyom Research Institute for Solid State Physics, Hungarian Academy of Sciences, P.O. Box 49, 1525 Budapest, Hungary |
| Full Text PDF |
| Spin chains and spin ladders can have a variety of gapless (critical) or gapped (massive) phases depending on the length of the spin and the type of coupling. A brief review of the results on some simple models is given with emphasis on the generation of the Haldane gap in anisotropic spin ladders. |
| DOI: 10.12693/APhysPolA.97.81 PACS numbers: 75.10.Jm |