Collective Magnetic Excitations in a Photo-excited Electron-doped Cuprate Superconductor

Abstract

Elucidating the microscopic behavior of cuprates under ultrafast photoexcitation offers critical insights into their highly correlated out-of-equilibrium states. Although quasiparticle dynamics have been investigated extensively, the behavior of collective magnetic excitations remains comparatively unexplored. Here, we use time-resolved resonant inelastic X-ray scattering (trRIXS) at the Cu $L_3$-edge to track the collective magnetic excitations (paramagnons) in an optimally electron-doped cuprate driven out-of-equilibrium by a femtosecond pump laser pulse. Upon pumping, we observed an anti-Stokes signal associated with paramagnon generation, which modifies the paramagnon dispersion near the zone center, although the bandwidth remained unchanged. Moreover, the spectral weight exhibits a momentum-dependent variation across the Brillouin zone. The light-driven boost of the paramagnon population and the resulting spectral-weight transfer could provide new leverage to manipulate the properties of cuprates.

arXiv commentAccepted in Physical Review Letters

References in corpus (26)

• Observation of Floquet-Bloch states on the surface of a topological insulator
• Progress and perspectives on the electron-doped cuprates
• Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5
• Nonthermal pathways to ultrafast control in quantum materials
• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Intense paramagnon excitations in a large family of high-temperature superconductors
• Spin correlations in the electron-doped high-transition-temperature superconductor Nd{2-x}Ce{x}CuO{4+/-delta}
• Ultrafast energy and momentum resolved dynamics of magnetic correlations in photo-doped Mott insulator Sr${}_2$IrO${}_4$
• Three dimensional collective charge excitations in electron-doped cuprate superconductors
• Asymmetry of collective excitations in electron and hole doped cuprate superconductors
• High-energy spin and charge excitations in electron-doped copper oxide superconductors
• The Strange Metal State of the Electron-Doped Cuprates
• Melting of Charge Stripes in Vibrationally Driven La1.875Ba0.125CuO4: Assessing the Respective Roles of Electronic and Lattice Order in Frustrated Superconductors
• Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor
• Probing light-driven quantum materials with ultrafast resonant inelastic X-ray scattering
• Fermi surface reconstruction in electron-doped cuprates without antiferromagnetic long-range order
• Theoretical Understanding of Photon Spectroscopies in Correlated Materials In and Out of Equilibrium
• Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La${}_{2-x}$Ce${}_x$CuO${}_4$
• Laser-Induced Transient Magnons in Sr3Ir2O7 Throughout the Brillouin Zone
• Emergence of pseudogap from short-range spin-correlations in electron doped cuprates
• Time-resolved ARPES on cuprates: Tracking the low-energy electrodynamics in the time domain
• Characterization of photoinduced normal state through charge density wave in superconducting YBa${}_2$Cu${}_3$O${}_{6.67}$
• Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS
• Anomalous normal state gap in an electron-doped cuprate
• Sampling Electronic Fock States using Determinant Quantum Monte Carlo
• Time-resolved X-ray Spectroscopy from the Atomic Orbital Ground State Up