| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Wolverson, Daniel
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead-Free (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3citations
- 2024Spin-order-dependent magneto-elastic interactions in two dimensional antiferromagnetic MnPSe3 observed through Raman spectroscopycitations
- 2024Porous structure enhances the longitudinal piezoelectric coefficient and electromechanical coupling coefficient of lead‐free (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3citations
- 2023Exploring the Charge Density Wave Phase of 1T-TaSe2citations
- 2020Excitonic and lattice contributions to the charge density wave in 1T-TiSe2 revealed by a phonon bottleneckcitations
- 2020Phase behavior and substitution limit of mixed cesium-formamidinium lead triiodide perovskitescitations
- 2018Investigating nanostructures in carbon fibres using Raman spectroscopycitations
- 2017Strain-induced phonon shifts in tungsten disulfide nanoplatelets and nanotubescitations
- 2017Interfacial control in graphene- and transition metal dichalcogenide-polymer nanocomposites
- 2017Electronic band structure of ReS 2 by high-resolution angle-resolved photoemission spectroscopycitations
- 2017Electronic bandstructure and van der Waals coupling of ReSe2 revealed by high-resolution angle-resolved photoemission spectroscopycitations
- 2017Electronic band structure of ReS2 by high-resolution angle-resolved photoemission spectroscopycitations
- 2016Strain-induced phonon shifts in tungsten disulfide nanoplatelets and nanotubescitations
- 2016A comparison of the micromechanics of graphene- and transition metal dichalcogenide-nanocomposites
- 2014Raman spectra of monolayer, few-layer, and bulk ReSe 2 :An anisotropic layered semiconductorcitations
- 2014Raman spectra of monolayer, few-layer, and bulk ReSe2citations
- 2013Investigation of the sp3 structure of carbon fibres uUsing Uv-Raman spectroscopycitations
- 2012Porous silicon nanocrystals in a silica aerogel matrixcitations
- 2010Excitons in motion in II-VI semiconductorscitations
- 2010Carbon nanoparticle surface functionalisation: converting negatively charged sulfonate to positively charged sulfonamidecitations
- 2008Coherent Raman detected electron spin resonance spectroscopy of metalloproteins: linking electron spin resonance and magnetic circular dichroismcitations
- 2008Thin-film modified electrodes with reconstituted cellulose-PDDAC films for the accumulation and detection of triclosancitations
- 2000Band structure parameters of quaternary phosphide semiconductor alloys investigated by magneto-optical spectroscopy
Places of action
| Organizations | Location | People |
|---|
article
Excitonic and lattice contributions to the charge density wave in 1T-TiSe2 revealed by a phonon bottleneck
Abstract
Understanding collective electronic states such as superconductivity and charge density waves is pivotal for fundamental science and applications. The layered transition metal dichalcogenide 1T-TiSe2 hosts a unique charge density wave (CDW) phase transition whose origins are still not fully understood. Here, we present ultrafast time- and angle-resolved photoemission spectroscopy (TR-ARPES) measurements complemented by time-resolved reflectivity (TRR) which allows us to establish the contribution of excitonic and electron-phonon interactions to the CDW. We monitor the energy shift of the valence band (VB) and coupling to coherent phonons as a function of laser fluence. The VB shift, directly related to the CDW gap closure, exhibits a markedly slower recovery dynamics at fluences above Fth = 60 microJ cm-2. This observation coincides with a shift in the relative weight of coherently coupled phonons to higher frequency modes in time-resolved reflectivity (TRR), suggesting a phonon bottleneck. Using a rate equation model, the emergence of a high-fluence bottleneck is attributed to an abrupt reduction in coupled phonon damping and an increase in exciton dissociation rate. Thus, our work establishes the important role of both excitonic and phononic interactions in the CDW phase transition, as well as the Bose-Einstein condensation of excitons in 1T-TiSe2.