Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS

Abstract

Investigations of magnetically ordered phases on the femtosecond timescale have provided significant insights into the influence of charge and lattice degrees of freedom on the magnetic sub-system. However, short-range magnetic correlations occurring in the absence of long-range order, for example in spin-frustrated systems, are inaccessible to many ultrafast techniques. Here, we show how time-resolved resonant inelastic X-ray scattering (trRIXS) is capable of probing such short-ranged magnetic dynamics in a charge-transfer insulator through the detection of a Zhang-Rice singlet exciton. Utilizing trRIXS measurements at the O K-edge, and in combination with model calculations, we probe the short-range spin-correlations in the frustrated spin chain material CuGeO3 following photo-excitation, revealing a strong coupling between the local lattice and spin sub-systems.

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• Nonthermal pathways to ultrafast control in quantum materials
• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
• Inverse Faraday effect in Mott insulators
• Photo-induced nonequilibrium states in Mott insulators
• Strong-coupling magnetophononics: Self-blocking, phonon-bitriplons, and spin-band engineering
• Probing magnetic orbitals and Berry curvature with circular dichroism in resonant inelastic X-ray scattering
• A set-up for Hard X-ray Time-resolved Resonant Inelastic X-ray Scattering at SwissFEL
• Numerical study of resonant inelastic X-ray scattering at the oxygen $K$-edge in insulating cuprates
• Dynamical correlations and nonequilibrium sum rules in photodoped Hubbard ladders
• Collective Magnetic Excitations in a Photo-excited Electron-doped Cuprate Superconductor
• Excitations across the equilibrium and photoinduced `hidden' states of magnetoresistive manganites