Optical control of vibrational coherence triggered by an ultrafast phase transition

Abstract

Femtosecond time-resolved x-ray diffraction is employed to study the dynamics of the periodic lattice distortion (PLD) associated with the charge-density-wave (CDW) in K0.3MoO3. Using a multi-pulse scheme we show the ability to extend the lifetime of coherent oscillations of the PLD about the undistorted structure through re-excitation of the electronic states. This suggests that it is possible to enter a regime where the symmetry of the potential energy landscape corresponds to the high symmetry phase but the scattering pathways that lead to the damping of coherent dynamics are still controllable by altering the electronic state population. The demonstrated control over the coherence time offers new routes for manipulation of coherent lattice states.

arXiv comment18 pages, 5 figures, including supplementary information

References in corpus (5)

• Ultrafast changes in lattice symmetry probed by coherent phonons
• Coherent dynamics of macroscopic electronic order through a symmetry-breaking transition
• Dynamics of photoinduced Charge Density Wave-metal phase transition in K0.3MoO3
• Coherent order parameter dynamics in SmTe${}_3$
• A dynamical stability limit for the charge density wave in K0.3MoO3

Cited by in corpus (10)

• Light-induced emergent phenomena in 2D materials and topological materials
• Coherent control of a structural phase transition in a solid-state surface system
• Terahertz electric-field driven dynamical multiferroicity in SrTiO${}_3$
• Nonequilibrium Charge-Density-Wave Order Beyond the Thermal Limit
• Origin of Immediate Damping of Coherent Oscillations in Photoinduced Charge Density Wave Transition
• Multi-mode excitation drives disorder during the ultrafast melting of a C4-symmetry-broken phase
• Inhomogeneous disordering at a photo-induced charge density wave transition
• Ultrafast all-optical manipulation of the charge-density-wave in VTe${}_2$
• Optical amplification in a CDW-phase of a quasi-two dimensional material
• Highly anisotropic transient optical response of charge density wave order in ZrTe${}_3$