Quantum Statistics of Interacting Dimer Spin Systems

Details Quantum Statistics of Interacting Dimer Spin Systems Quantum Statistics of Interacting Dimer Spin Systems

2005-10-18

arxiv.org/abs/cond-mat/0510487v1

Phys. Rev. Lett. 95, 267201 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.95.267201

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.

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