Collective singlet excitations and evolution of raman spectral weights in the 2D spin dimer compound SrCu2(BO3)(2)
Raman light scattering of the two-dimensional quantum spin system SrCu2(BO3)(2) shows a rich structure in the magnetic excitation spectrum, including several well-defined bound state modes at low temperature, and a scattering continuum and quasielastic light scattering contributions at high temperature. The key to the understanding of the unique features of SrCu2(BO3)(2) is the presence of strong interactions between well-localized triplet excitations in the network of orthogonal spin dimers realized in this compound.
Lemmens
P
2. Physikalisches Institut, RWTH Aachen, 52056 Aachen, Germany.
Grove
M
Fischer
M
Guntherodt
G
Kotov
VN
Kageyama
H
Onizuka
K
Ueda
Y