Direct Simulations of the Quantum Model for CsNiF3
A. Caramico D'Auria, F. Esposito, U. Esposito
Dipartimento di Scienze Fisiche, Universitá di Napoli, Piazzale Tecchio, Napoli, Italy

G. Kamieniarz and R. Dekeyser
Institute of Theoretical Physics, University of Leuven, Celestijnenlaan 200D, Leuven, Belgium
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We address the problem of reliability of a finite-chain technique for CsNiF3. We investigate the effect of the boundary conditions, completely neglected so far, and apply a new extrapolation procedure appropriate for quantities showing non-monotonic behaviour. From a detailed analysis of the specific heat existing theoretical estimates for the model parameters are discriminated and a strong evidence for the reliability of the direct finite-chain technique predictions is presented.
DOI: 10.12693/APhysPolA.85.409
PACS numbers: 64.60.Cn, 75.10.Dg, 75.10.Jm, 75.40.Cx, 75.40.Mg