Low-Lying Magnetic Excitation of the Shastry-Sutherland Model

Abstract

By using perturbation calculation and numerical diagonalization, low-energy spin dynamics of the Shastry-Sutherland model is investigated paying particular attention to the two-particle coherent motion. In addition to spin-singlet- and triplet bound states, we find novel branches of coherent motion of a bound quintet pair, which are usually unstable because of repulsion. Unusual dispersion observed in neutron-scattering measurements are explained by the present theory. The importance of the effects of phonon is also pointed out.

arXiv comment4 pages, 6 figures combined into 1 PSfile. Final version to appear in Phys.Rev.Lett. (Jan. 2000)

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• Effects of in-chain and off-chain substitutions on spin fluctuations in the spin-Peierls compound CuGeO_3

Cited by in corpus (40)

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• Magnetocaloric effect in one-dimensional antiferromagnets
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• Phase Diagram of the quadrumerized Shastry-Sutherland Model
• Field-Induced Magnetic Ordering in the Quantum Spin System KCuCl${}_3$
• Magnetization plateaus of SrCu_2(BO_3)_2 from a Chern-Simons theory
• Bond operator theory of doped antiferromagnets: from Mott insulators with bond-centered charge order, to superconductors with nodal fermions
• ESR study on the excited state energy spectrum of SrCu${}_2$(BO${}_3$)${}_2$ -a central role of multiple-triplet bound states
• Effective Theory of Magnetization Plateaux in the Shastry-Sutherland Lattice
• Thermodynamic properties of the Shastry-Sutherland model throughout the dimer-product phase
• Frustrated 3-Dimensional Quantum Spin Liquid in CuHpCl
• Observation of a Transient Magnetization Plateau in a Quantum Antiferromagnet on the Kagome Lattice
• A Novel Ordered Phase in SrCu2(BO3)2 under High Pressure
• Dynamic Structure Factor of the Two-Dimensional Shastry-Sutherland Model
• Thermodynamic properties of the Shastry-Sutherland model from quantum Monte Carlo simulations
• Dynamics and Instabilities of the Shastry-Sutherland Model
• Continuous and Discontinuous Quantum Phase Transitions in a Model Two-Dimensional Magnet
• Field-Induced Effects of Anisotropic Magnetic Interactions in SrCu2(BO3)2
• Where is the Quantum Spin Nematic?
• Low-lying excitations and magnetization process of coupled tetrahedral systems
• Ground-state phase diagram and magnetic properties of a tetramerized spin-1/2 J_1-J_2 model: BEC of bound magnons and absence of the transverse magnetization
• Magnon Dispersion and Anisotropies in SrCu${}_2$(BO${}_3$)${}_2$
• Maple Leaf Antiferromagnet in a Magnetic Field
• Magnetization and Lyapunov exponents on a kagome chain with multi-site exchange interaction
• Field-induced bound-state condensation and spin-nematic phase in SrCu${}_2$(BO${}_3$)${}_2$ revealed by neutron scattering up to 25.9 T
• Electron spin resonance for the detection of long-range spin nematic order
• Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling
• Spontaneous trimerization in two-dimensional Antiferromagnets
• Quantum phase transitions of the S=1 Shastry-Sutherland model
• Theory of rare-earth Kramers magnets on a Shastry-Sutherland lattice: dimer phases in presence of strong spin-orbit coupling
• Spin excitations in the two-dimensional strongly coupled dimer system malachite
• Numerical Study of Excited States in the Shastry-Sutherland Model
• Triplons, triplon pairs and dynamical symmetries in laser-driven Shastry-Sutherland magnets
• Anomalous thermal broadening in the Shastry-Sutherland model and SrCu${}_2($BO${}_3{)}_2$
• Dynamics of quantum spin-nematics: Comparisons with canted antiferromagnets
• Quantum entanglement of XY-type spin dimers in Shastry-Sutherland lattice
• Magnetization of Antiferromagnetic Cactus Graph Model with Exact Dimer Ground State
• Intrinsic suppression of topological thermal Hall effect in an exactly solvable quantum magnet
• Hole Dynamics in the Orthogonal-Dimer Spin System