2000/05/22 by H. Kageyama, Hiroshi Kageyama, M. Nishi +13 · 7 citations
Earth and Planetary Sciences · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic physics #Dimer #Excitation #Excited state #Ground state #High-pressure geophysics and materials #Inelastic neutron scattering #Inelastic scattering #Neutron #Neutron scattering #Nuclear magnetic resonance #Nuclear physics #Optics #Orthogonality #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scattering #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.84.5876
12 pages, with 4 figures, to appear in Phys. Rev. Lett
arxiv created 2000/05/22 · openalex publication_date 2000/06/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We performed inelastic neutron scattering on the 2D Shastry-Sutherland system SrCu2(11BO3)2 with an exact dimer ground state. Three energy levels at around 3, 5, and 9 meV were observed at 1.7 K. The lowest excitation at 3.0 meV is almost dispersionless with a bandwidth of 0.2 meV at most, showing a significant constraint on a single-triplet hopping owing to the orthogonality of the neighboring dimers. In contrast, the correlated two-triplet excitations at 5 meV exhibit a more dispersive behavior.