Direct observation of multi-spinon excitations outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr2CuO3

Abstract

One-dimensional (1D) magnetic insulators have attracted significant interest as a platform for studying emergent phenomena such as quasiparticle fractionalization and quantum criticality. The antiferromagnetic Heisenberg chain of spins-1/2 is an important reference system; its elementary excitations are spin-1/2 quasiparticles called spinons that are always created in pairs. However, while inelastic neutron scattering (INS) experiments routinely observe the excitation continuum associated with two-spinon states, the presence of more complex dynamics associated with four-spinon states has only been inferred from comparison with theory. Here, we show that resonant inelastic x-ray scattering (RIXS) is capable of accessing the four-spinon excitations directly, in a spectroscopic region separated from the two-spinon continuum. Our results provide the first direct measurement of four-spinon excitations, which is made possible by the fundamentally different correlation functions probed by RIXS compared to INS. This advance holds great promise as a tool in the search for novel quantum states, in particular quantum spin liquids.

References in corpus (29)

• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Intense paramagnon excitations in a large family of high-temperature superconductors
• Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
• Fractional spinon excitations in the quantum Heisenberg antiferromagnetic chain
• Multispinon continua at zero and finite temperature in a near-ideal Heisenberg chain
• Reduction of ordered moment and Neel temperature of quasi one-dimensional antiferromagnets Sr2CuO3 and Ca2CuO3
• Resonant X-rays at the Cu L-edge as a momentum dependent probe of the magnetic excitation spectrum in cuprates
• Two-spinon dynamic structure factor of the one-dimensional S=1/2 Heisenberg antiferromagnet
• Confinement of fractional quantum number particles in a condensed matter system
• Dispersive charge density wave excitations and temperature dependent commensuration in Bi2Sr2CaCu2O8+δ
• Asymmetry of collective excitations in electron and hole doped cuprate superconductors
• Covalent bonding and magnetism in cuprates
• Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors
• The 4-spinon dynamical structure factor of the Heisenberg chain
• Collective spin excitations in a quantum spin ladder probed by high-resolution Resonant Inelastic X-ray Scattering
• Orbital-Exchange and Fractional Quantum Number Excitations in an f-electron Metal Yb${}_2$Pt${}_2$Pb
• Bimagnon studies in cuprates with Resonant Inelastic X-ray Scattering at the O K edge. I - An assessment on La2CuO4 and a comparison with the excitation at Cu L3 and Cu K edges
• Magnetic Excitations in La2CuO4 probed by Indirect Resonant Inelastic X-ray Scattering
• Electron-lattice interactions strongly renormalize the charge transfer energy in the spin-chain cuprate Li${}_2$CuO${}_2$
• Determining the Short-Range Spin Correlations in Cuprate Chain Materials with Resonant Inelastic X-ray Scattering
• The Spin-Exchange Dynamical Structure Factor of the S=1/2 Heisenberg Chain
• Microscopic origin of spin-orbital separation in Sr2CuO3
• Exact diagonalization results for resonant inelastic x-ray scattering spectra of one-dimensional Mott insulators
• Two-Spinon and Orbital Excitations of the Spin-Peierls System TiOCl
• Dispersive Magnetic and Electronic Excitations in Iridate Perovskites Probed with Oxygen $K$-Edge Resonant Inelastic X-ray Scattering
• Computing Resonant Inelastic X-Ray Scattering Spectra Using The Density Matrix Renormalization Group Method
• Comment on "Two-spinon and four-spinon continuum in a frustrated ferromagnetic spin-1/2 chain" by M. Enderle et al
• Doping dependence of magnetic excitations of 1D cuprates as probed by Resonant Inelastic x-ray Scattering
• Magnetic excitation spectra of strongly correlated quasi-one dimensional systems: Heisenberg versus Hubbard-like behavior

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• Computing Resonant Inelastic X-Ray Scattering Spectra Using The Density Matrix Renormalization Group Method
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• Fractional and composite excitations of antiferromagnetic quantum spin trimer chains
• Spinon Excitations in the Quasi-1D S = 1/2 Chain Cs4CuSb2Cl12
• Particle-hole asymmetry in the dynamical spin and charge structure factors of the corner-shared one-dimensional cuprates
• Theoretical study of the spin and charge dynamics of two-leg ladders as probed by resonant inelastic x-ray scattering
• Simulation of time-dependent resonant inelastic X-ray scattering using non-equilibrium dynamical mean-field theory
• A Candidate for the Quantum Spin Liquid Ground-State in the Shastry-Sutherland Lattice Material Yb${}_2$Be${}_2$GeO${}_7$
• Numerical Investigation of Spin Excitations in a Doped Spin Chain
• Three-body bound states in antiferromagnetic spin ladders
• Mobile orbitons in Ca${}_2$CuO${}_3$: crucial role of the Hund's exchange
• Unraveling higher-order corrections in the spin dynamics of RIXS spectra
• Spectroscopic signatures of next-nearest-neighbor hopping in the charge and spin dynamics of doped one-dimensional antiferromagnets
• Ground state and spectral properties of the doped one-dimensional optical Hubbard-Su-Schrieffer-Heeger model
• Fractionalization Signatures in the Dynamics of Quantum Spin Liquids
• Single- and Multimagnon Dynamics in Antiferromagnetic $\alpha$-Fe${}_2$O${}_3$ Thin Films
• High energy spin excitations in the quantum spin liquid candidate Zn-barlowite probed by resonant inelastic x-ray scattering
• Two-band Conduction and Nesting Instabilities in Superconducting Ba${}_2$CuO${}_{3+\delta }$: a First Principles Study
• Quantum phase transitions and composite excitations of antiferromagnetic spin trimer chains in a magnetic field
• Correlations and incipient antiferromagnetic order within the linear Mn chains of metallic Ti${}_4$MnBi${}_2$
• Low temperature magnetism of KAgF3
• Resonant inelastic x-ray scattering study of vector chiral ordered kagome antiferromagnet
• Pseudo-transition between antiferromagnetic and charge orders in a minimal spin-pseudospin model of one-dimensional cuprates
• Nonequilibrium RIXS study of an electron-phonon model
• Emergent quantum Majorana metal from a chiral spin liquid
• Theory of electron-phonon interactions in extended correlated systems probed by resonant inelastic x-ray scattering
• Ultrafast control of spin-orbital separation probed with time-resolved RIXS
• Exact dynamics of two holes in two-leg antiferromagnetic ladders
• Torque equilibrium spin wave theory study of anisotropy and Dzyaloshinskii-Moriya interaction effects on the indirect K$-$ edge RIXS spectrum of a triangular lattice antiferromagnet
• Localized character of charge excitations for La${}_{2-x}$Sr${}_x$NiO${}_{4+\delta }$ revealed by oxygen $K$-edge resonant inelastic X-ray scattering
• Softening of $dd$ excitation in the resonant inelastic x-ray scattering spectra as a signature of Hund's coupling in nickelates
• Tunable surface electron gas and effect of phonons in Sr${}_2$CuO${}_3$: A first-principles study
• Theoretical analysis of multi-magnon excitations in resonant inelastic x-ray scattering spectra of two-dimensional antiferromagnets
• Emergent Quadrupolar Order in the Spin-$1/2$ Kitaev-Heisenberg Model
• Resonant inelastic x-ray scattering spectra of spinon, doublon, and quarton excitations of a spin-$\frac{1}{2}$ antiferromagnetic Heisenberg trimer chain
• $K$ -edge and $L_3$ -edge RIXS study of columnar and staggered quantum dimer phases of the square lattice Heisenberg model
• Extracting the spin excitation spectrum of a fermionic system using a quantum processor
• Numerical study of resonant inelastic X-ray scattering at the oxygen $K$-edge in insulating cuprates
• Nonequilibrium-DMFT based RIXS investigation of the two-orbital Hubbard model
• Observation of spin-conserving two-spinon continuum in the $S$=1/2 antiferromagnetic chain system Sr${}_2$CuO${}_3$ using Cu $K$-edge resonant inelastic x-ray scattering
• Spin order, spin excitations, and RIXS spectra of spin-1/2 tetramer chains
• Witnessing Spin-Orbital Entanglement using Resonant Inelastic X-Ray Scattering
• Quasi-one-dimensional spin excitations in the iron pnictide NaFe${}_{0.53}$Cu${}_{0.47}$As
• Green's function theory of magnetism in Bi${}_2$CuO${}_4$: anisotropic Heisenberg XYZ model