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24 April 2024

» arxiv » cond-mat/0510487

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Quantum Statistics of Interacting Dimer Spin Systems
Ch. Rüegg ; B. Normand ; M. Matsumoto ; Ch. Niedermayer ; A. Furrer ; K. W. Krämer ; H. U. Güdel ; Ph. Bourges ; Y. Sidis ; H. Mutka ;
Date:	19 Oct 2005
Abstract:	The compound TlCuCl3 represents a model system of dimerized quantum spins with strong interdimer interactions. We investigate the triplet dispersion as a function of temperature by inelastic neutron scattering experiments on single crystals. By comparison with a number of theoretical approaches we demonstrate that the description of Troyer, Tsunetsugu, and Wuertz [Phys. Rev. B 50, 13515 (1994)] provides an appropriate quantum statistical model for dimer spin systems at finite temperatures, where many-body correlations become particularly important.
Source:	arXiv, cond-mat/0510487
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