title: Collective singlet excitations and evolution of raman spectral weights in the 2D spin dimer compound SrCu2(BO3)(2)
abstract: 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.
authors.affiliation: 2. Physikalisches Institut, RWTH Aachen, 52056 Aachen, Germany.
authors.initials: P
authors.lastname: Lemmens
authors.initials: M
authors.lastname: Grove
authors.initials: M
authors.lastname: Fischer
authors.initials: G
authors.lastname: Guntherodt
authors.initials: VN
authors.lastname: Kotov
authors.initials: H
authors.lastname: Kageyama
authors.initials: K
authors.lastname: Onizuka
authors.initials: Y
authors.lastname: Ueda