Schedule Nov 20, 2002
Spin-singlet nature of various dimerized cuprates. From ab-initio to experiment
Roser Valenti, University of Dortmund
We investigate by means of ab-initio electronic structure analysis and quantum Monte Carlo calculations the scenario where longer-ranged magnetic interactions dominate over short-ranged interactions in the physical description of compounds. This question is discussed, in particular, for the case of CaCuGe2O6 -a system related to the spin-Peierls compound CuGeO3- and the isotructural quantum spin systems KCuCl3 and TlCuCl3.

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