0000000000307374

AUTHOR

Michael Heber

showing 3 related works from this author

Suppression of the vacuum space-charge effect in fs-photoemission by a retarding electrostatic front lens

2021

Review of scientific instruments 92(5), 053703 (2021). doi:10.1063/5.0046567

010302 applied physicsPhotonMaterials scienceElectronPhotoelectric effect01 natural sciencesFluenceSpace charge010305 fluids & plasmas620Electric fieldExtreme ultraviolet0103 physical sciencesddc:620Atomic physicsInstrumentationStorage ring
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Observation of an excitonic Mott transition through ultrafast core-cum-conduction photoemission spectroscopy

2020

Time-resolved soft-X-ray photoemission spectroscopy is used to simultaneously measure the ultrafast dynamics of core-level spectral functions and excited states upon excitation of excitons in WSe$_2$. We present a many-body approximation for the Green's function, which excellently describes the transient core-hole spectral function. The relative dynamics of excited-state signal and core levels reveals a delayed core-hole renormalization due to screening by excited quasi-free carriers, revealing an excitonic Mott transition. These findings establish time-resolved core-level photoelectron spectroscopy as a sensitive probe of subtle electronic many-body interactions and an ultrafast electronic…

Time ResolvedPhase transitionMaterials sciencePhotoemission spectroscopyExcitonFOS: Physical sciencesGeneral Physics and Astronomy01 natural sciencesMolecular physicsCondensed Matter - Strongly Correlated ElectronsCore PhysicsX-ray photoelectron spectroscopyMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesddc:530010306 general physicsNon-equilibriumCondensed Matter - Materials ScienceSettore FIS/03Strongly Correlated Electrons (cond-mat.str-el)Condensed Matter - Mesoscale and Nanoscale PhysicsMaterials Science (cond-mat.mtrl-sci)3. Good healthMott transitionExcited stateMany-BodyUltrashort pulseExcitation
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Time-resolved core-level photoemission data of tungsten diselenide

2020

Pump-probe core-level photoemission spectroscopy data of tungsten diselenide (WSe2) measured using an electron momentum microscope at the FLASH Free-electron laser.

photoemission spectroscopyXPSPhysics::Optics2D materialpump-probe spectroscopyfree electron laser
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