6533b82bfe1ef96bd128e17d
RESEARCH PRODUCT
Optical control of vibrational coherence triggered by an ultrafast phase transition
S. GrübelJ. RittmannSteven L. JohnsonSteven L. JohnsonM. KubliT. HuberGerhard IngoldTeresa KubackaMatteo SavoiniElsa AbreuLaurenz RettigMartin J. NeugebauerElisabeth M. BothschafterVincent EspositoDamir DominkoPaul BeaudJure Demsarsubject
DiffractionPhysicsPhase transitionCoherence timeeducation.field_of_studyStrongly Correlated Electrons (cond-mat.str-el)ScatteringPopulationFOS: Physical sciences02 engineering and technology021001 nanoscience & nanotechnology01 natural sciences3. Good healthCondensed Matter - Strongly Correlated ElectronsLattice (order)0103 physical sciencesFemtosecondAtomic physics010306 general physics0210 nano-technologyeducationultrafast phase transition charge density wave optical controlCoherence (physics)description
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-01 |