| Автор | N Cavadini |
| Автор | G Heigold |
| Автор | W Henggeler |
| Автор | A Furrer |
| Автор | H-U Güdel |
| Автор | K Krämer |
| Автор | H Mutka |
| Дата выпуска | 2000-06-26 |
| dc.description | KCuCl<sub>3</sub> 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 KCuCl<sub>3</sub>. 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 TlCuCl<sub>3</sub> and NH<sub>4</sub>CuCl<sub>3</sub>, albeit at different coupling ratios with respect to KCuCl<sub>3</sub>. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Quantum magnetic interactions in S = 1/2 KCuCl<sub>3</sub> |
| Тип | paper |
| DOI | 10.1088/0953-8984/12/25/310 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 12 |
| Первая страница | 5463 |
| Последняя страница | 5472 |
| Выпуск | 25 |
