Quantum Monte Carlo Simulation of the Trellis Lattice Heisenberg Model for SrCu 2 O 3 and CaV 2 O 5
1998; Physical Society of Japan; Volume: 67; Issue: 11 Linguagem: Inglês
10.1143/jpsj.67.3918
ISSN1347-4073
AutoresShin Miyahara, Matthias Troyer, D. C. Johnston, Kazuo Ueda,
Tópico(s)Theoretical and Computational Physics
ResumoWe study the spin-1/2 trellis lattice Heisenberg model, a coupled spin ladder system, both by perturbation around the dimer limit and by quantum Monte Carlo simulations. We discuss the influence of the inter-ladder coupling on the spin gap and the dispersion, and present results for the temperature dependence of the uniform susceptibility. The latter was found to be parameterized well by a mean-field type scaling ansatz. Finally we discuss fits of experimental measurements on SrCu$_2$O$_3$ and CaV$_2$O$_5$ to our results.
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