Neutron scattering experiments on low-dimensional quantum spin systems - Spin excitations in KCuCl3 and SrCu2(BO3)(2)

Authors
Kakurai, K Nishi, M Nakajima, K Nukui, K Aso, N Kato, T Tanaka, H Kageyama, H Ueda, Y Regnault, LP Grenier, B Fok, B
Citation
K. Kakurai et al., Neutron scattering experiments on low-dimensional quantum spin systems - Spin excitations in KCuCl3 and SrCu2(BO3)(2), J PHYS CH S, 62(1-2), 2001, pp. 141-147
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN journal
00223697 → ACNP
Volume
62
Issue
1-2
Year of publication
2001
Pages
141 - 147
Database
ISI
SICI code
0022-3697(200101/02)62:1-2<141:NSEOLQ>2.0.ZU;2-2
Abstract
We present the results of inelastic neutron scattering experiments on quant um spin systems KCuCl3 and SrCu2(BO3)(2). Both compounds show non-magnetic singlet ground state behaviour at low temperature. KCuCl3 turns out to he a weakly coupled dimer system without any strong frustrating interdimer inte ractions. SrCu2(BO3)(2), on the other hand, should be regarded as a strongl y coupled dimer system with a strong frustration originating from the ortho gonal arrangement of the neighbouring dimers. The characteristics of the sp in excitations in these two dimer systems are compared and discussed, (C) 2 000 Elsevier Science Ltd. All rights reserved.