Topological Triplon Modes and Bound States in a Shastry-Sutherland Magnet

Abstract

The twin discoveries of the quantum Hall effect, in the 1980's, and of topological band insulators, in the 2000's, were landmarks in physics that enriched our view of the electronic properties of solids. In a nutshell, these discoveries have taught us that quantum mechanical wavefunctions in crystalline solids may carry nontrivial topological invariants which have ramifications for the observable physics. One of the side effects of the recent topological insulator revolution has been that such physics is much more widespread than was appreciated ten years ago. For example, while topological insulators were originally studied in the context of electron wavefunctions, recent work has led to proposals of topological insulators in bosonic systems: in photonic crystals, in the vibrational modes of crystals, and in the excitations of ordered magnets. Here we confirm the recent proposal that, in a weak magnetic field, the dimerized quantum magnet SrCu${}_2$(BO${}_3$)${}_2$ is a bosonic topological insulator with nonzero Chern number in the triplon bands and topologically protected chiral edge excitations.

arXiv comment33 pages, 14 figures (preprint format and including supplementary material)

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• HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
• Direct Evidence for the Localized Single-Triplet Excitations and the Dispersive Multi-Triplets Excitations in SrCu2(BO3)2
• Crystals of bound states in the magnetization plateaus of the Shastry-Sutherland model
• Hall effect of triplons in a dimerized quantum magnet
• Dispersion and Symmetry of Bound States in the Shastry-Sutherland Model
• Dzyaloshinski-Moriya Interaction in the 2D Spin Gap System SrCu2(BO3)2
• Collective Singlet Excitations and Evolution of Raman Spectral Weights in the 2D Spin Dimer Compound SrCu2(BO3)2
• High Resolution Study of Spin Excitations in the Shastry-Sutherland Singlet Ground State of SrCu2(BO3)2
• ESR study on the excited state energy spectrum of SrCu${}_2$(BO${}_3$)${}_2$ -a central role of multiple-triplet bound states
• Low-Lying Magnetic Excitation of the Shastry-Sutherland Model
• The effect of Dzyaloshinskii-Moriya interactions on the phase diagram and magnetic excitations of SrCu2(BO3)2
• Magnon Dispersion and Anisotropies in SrCu${}_2$(BO${}_3$)${}_2$
• Symmetry and light coupling to phononic and collective magnetic excitations in SrCu_2(BO_3)_2
• Multi-triplet bound states and finite-temperature dynamics in highly frustrated quantum spin ladders
• Collective Magnetic Excitations in SrCu_2(BO_3)_2

Cited by in corpus (80)

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• Topological Magnons: A Review
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• Disorder-Free Localization and Many-Body Quantum Scars from Magnetic Frustration
• Topological excitations in the ferromagnetic Kitaev-Heisenberg model
• Discovery of coexisting Dirac and triply degenerate magnons in a three-dimensional antiferromagnet
• Non-Hermitian topology of spontaneous magnon decay
• Topological magnon insulator spin excitations in the two-dimensional ferromagnet CrBr${}_3$
• Thermodynamic properties of the Shastry-Sutherland model throughout the dimer-product phase
• Thermal Hall effects in quantum magnets
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• Weyl magnons in pyrochlore antiferromagnets with all-in-all-out orders
• Dynamics and Instabilities of the Shastry-Sutherland Model
• Topological magnon bands for magnonics
• Topological magnetic excitations
• Photoinduced Topological Phase Transitions in Topological Magnon Insulators
• Plaquette Singlet Transition, Magnetic Barocaloric Effect, and Spin Supersolidity in the Shastry-Sutherland Model
• Magnetic properties of the Shastry-Sutherland lattice material BaNd${}_2$ZnO${}_5$
• Evidence for magnon-phonon coupling in the topological magnet Cu${}_3$TeO${}_6$
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• Triplon band splitting and topologically protected edge states in the dimerized antiferromagnet
• Spontaneous Crystal Thermal Hall Effect in Insulating Altermagnets
• ${\mathbb{Z}}_2$ topological quantum paramagnet on a honeycomb bilayer
• Field-Induced Partial Disorder in a Shastry-Sutherland Lattice
• Topological quantum paramagnet in a quantum spin ladder
• Dirac surface states in magnonic analogs of topological crystalline insulators
• Identifying, and constructing, complex magnon band topology
• Dimer Physics in the Frustrated Cairo Pentagonal Antiferromagnet Bi2Fe4O9
• Topological Magnons in a One-dimensional Itinerant Flatband Ferromagnet
• Field-induced bound-state condensation and spin-nematic phase in SrCu${}_2$(BO${}_3$)${}_2$ revealed by neutron scattering up to 25.9 T
• Three-body bound states in antiferromagnetic spin ladders
• Quantum criticality with emergent symmetry in the extended Shastry-Sutherland model
• Topological Hybrids of Magnons and Magnon Bound Pairs
• Flavor-wave theory with quasiparticle damping at finite temperatures: Application to chiral edge modes in the Kitaev model
• Non-trivial topology of the quasi-one-dimensional triplons in the quantum antiferromagnet ${\text{BiCu}}_2{\text{PO}}_6$
• Thermal Hall effect incorporating magnon damping in localized spin systems
• Photoinduced Floquet topological magnons in Kitaev magnets
• Fractional magnetization plateaux of a spin-1/2 Heisenberg model on the Shastry-Sutherland lattice: effect of quantum XY interdimer coupling
• The topological magnon bands in the Flux state in Sashtry-Sutherland lattice
• Dirac cones and mass terms in bosonic spectra
• Weyl-triplons in SrCu2(BO3)2
• Dirac Hamiltonians for bosonic spectra
• Detecting End-States of Topological Quantum Paramagnets via Spin Hall Noise Spectroscopy
• Ultrafast Frustration-Breaking and Magnetophononic Driving of Singlet Excitations in a Quantum Magnet
• Real-space imaging of dispersive triplon excitations in engineered quantum magnets
• Squeezing-induced Topological Gap Opening on Bosonic Bogoliubov Excitations
• Thermal Hall Effect of Magnons from Many-Body Skew Scattering
• Fragility of ${\mathcal{Z}}_2$ topological invariant characterizing triplet excitations in a bilayer kagome magnet
• Thermally populated versus field-induced triplon bound states in the Shastry-Sutherland lattice SrCu${}_2$(BO${}_3$)${}_2$
• Negative Thermal Hall Conductance in Two-Dimer Shastry-Sutherland Model with π-flux Dirac Triplon
• Magnetic field-induced type-II Weylsemimetallic state in geometrically frustrated Shastry-Sutherland lattice GdB4
• Deconfined Quantum Critical Point: A Review of Progress
• Multipolar edge states in the breathing kagome model
• Electric field induced thermal Hall effect of triplons in the quantum dimer magnets $X$CuCl${}_3$ ($X=$ Tl, K)
• Kitaev-Heisenberg model on the star lattice: From chiral Majorana fermions to chiral triplons
• Triplons, Magnons, and Spinons in a Single Quantum Spin System: SeCuO3
• Magnon Hall effect in antiferromagnetic lattices
• Higher-order topology and corner triplon excitations in two-dimensional quantum spin-dimer models
• Quantum spin liquid phase in the Shastry-Sutherland model revealed by high-precision infinite projected entangled-pair states
• Theory of rare-earth Kramers magnets on a Shastry-Sutherland lattice: dimer phases in presence of strong spin-orbit coupling
• Thermal Hall conductivity of a valence bond solid phase in the square lattice $J_1$-$J_2$ antiferromagnet Heisenberg model with a Dzyaloshinskii-Moriya interaction
• Two-triplon excitations of the Kitaev-Heisenberg-Bilayer
• Evidence for strong correlations at finite temperatures in the dimerized magnet Na${}_2$Cu${}_2$TeO${}_6$
• Exact staggered dimer ground state and its stability in a two-dimensional magnet
• Triplons, triplon pairs and dynamical symmetries in laser-driven Shastry-Sutherland magnets
• Upper branch thermal Hall effect in quantum paramagnets
• Spin Nernst and thermal Hall effects of topological triplons in quantum dimer magnets on the maple-leaf and star lattices
• Spectroscopy and complex-time correlations using minimally entangled typical thermal states
• Pinch points and half moons encode Berry curvature
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• Anomalous thermal broadening in the Shastry-Sutherland model and SrCu${}_2($BO${}_3{)}_2$
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• Scattering Theory of Chiral Edge Modes in Topological Magnon Insulators
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• Coupled dimerized alternating-bond quantum spin chains in the distorted honeycomb-lattice magnet Cu${}_5$SbO${}_6$
• Fate of Bosonic Topological Edge Modes in the Presence of Many-Body Interactions
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• Intrinsic suppression of topological thermal Hall effect in an exactly solvable quantum magnet
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