@article{Cavadini_2000,
	doi = {10.1088/0953-8984/12/25/310},
	url = {https://doi.org/10.1088/0953-8984/12/25/310},
	year = 2000,
	month = {jun},
	publisher = {{IOP} Publishing},
	volume = {12},
	number = {25},
	pages = {5463--5472},
	author = {N Cavadini and G Heigold and W Henggeler and A Furrer and H-U Güdel and K Krämer and H Mutka},
	title = {Quantum magnetic interactions in$\less$b$\greater$$\less$i$\greater$S$\less$/i$\greater$$\less$/b$\greater$= 1/2 {KCuCl}$\less$sub$\greater$3$\less$/sub$\greater$},
	journal = {Journal of Physics: Condensed Matter},
	abstract = {KCuCl3 is an S = 1/2 magnetic insulator with a singlet ground state and a finite spin excitation gap. Above the gap, dispersive triplet excitation modes propagate in the whole reciprocal space. From single-crystal inelastic neutron investigations the three-dimensional coupling scheme is rationalized in the framework of a dimer Heisenberg model, and related to the structural features of KCuCl3. The experimental and theoretical characterization presented completes earlier works on the compound under investigation, providing also higher-order expressions for the singlet-triplet dispersion relation. The latter may also be of relevance for the parent quantum systems TlCuCl3 and NH4CuCl3, albeit at different coupling ratios with respect to KCuCl3.}
}