ONSAGER REACTION FIELD-THEORY OF A SPATIALLY ANISOTROPIC HEISENBERG-MODEL

Journal article

We discuss an Onsager reaction field approach to the paramagnetic phase of a spatially anisotropic Heisenberg model, with nearest-neighbor in-plane (J) and interplane (J) exchange couplings. The theory is physically transparent and, together with the use of suitable asymptotic approximations, provides a simple, consistent description of the crossover from effective two- to three-dimensional behavior, and captures well both the pure d=2 (=0) and d=3 (J=J) dimensional limits. Application to La2CuO4 is briefly considered. © 1995 The American Physical Society.

Authors: Eastwood, M; Logan, D

• Publication status: Published
• Journal: Physical Review B
• Volume: 52
• Issue: 13
• Pages: 9455-9461
• Publication date: 1995-10-01
• DOI: 10.1103/PhysRevB.52.9455
• EISSN: 1095-3795
• ISSN: 1098-0121
• Language: English