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Título: | Real-space renormalization group approach to the 2D antiferromagnetic Heisenberg model |
Autor: | Sierra, Germán CSIC ORCID; Martín-Delgado, Miguel Ángel | Palabras clave: | [PACS] General theory and models of magnetic ordering [PACS] Quantized spin models Ising problems [PACS] Lattice theory and statistics |
Fecha de publicación: | 1997 | Editor: | Elsevier | Citación: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 391: 381- 387 (1997) | Resumen: | We apply real-space RG techniques to study the quantum two-dimensional antiferromagnetic Heisenberg model for arbitrary values of the spin S on a square lattice. We introduce a 5-block truncation scheme which yields complete analytical results for renormalizing spin factors, ground state energy and non-zero staggered magnetization. Our RG-flow equations show that the 2D model remains massless ∀S. We propose that the valence bonds forming the ground state of the 2D-AF Heisenberg model on a square lattice rotate under the effect of the antiferromagnetic background. 1997 Published by Elsevier Science B.V. | URI: | http://hdl.handle.net/10261/102500 | DOI: | 10.1016/S0370-2693(96)01489-X | Identificadores: | doi: 10.1016/S0370-2693(96)01489-X issn: 0370-2693 |
Aparece en las colecciones: | (CFMAC-IFF) Artículos |
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