SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 15: Mini-Symposium: Ultrafast surface dynamics at the space-time limit II

O 15.4: Vortrag

Montag, 1. März 2021, 14:45–15:05, R1

Ultrafast atomic and electronic dynamics at the molecule-TiSe₂ interface — •Markus Scholz¹, Kiana Baumgärtner², Nils Wind³, Christian Metzger², Dmytro Kutnyakhov⁴, Michael Heber⁴, Lukas Wenthaus⁴, Friedrich Roth⁵, Kai Rossnagel⁶, Friedrich Reinert², and Serguei Molodtsov¹ — ¹European X-Ray Free-Electron Laser Facility, Schenefeld — ²Experimentelle Physik 7, Julius-Maximilians-Universität, Würzburg — ³Universität Hamburg — ⁴Deutsches Elektronen-Synchrotron DESY, Hamburg — ⁵TU Bergakademie Freiberg — ⁶Christian-Albrechts-Universität zu Kiel

In recent years layered transition-metal dichalcogenides (TMDCs) have been extensively investigated due to their intriguing electronic phenomena ranging from Mott localization to charge-density-wave (CDW) formation [1] as well as their potential for novel electronic and optical devices. First studies of adsorbed molecules on the TMDC surface have revealed a rich potential to tailor optical, electronic, and magnetic properties of organic-TMDC devices. However, very few studies have been carried out on understanding fundamental interactions at the molecule-TMDC interface. Time-resolved imaging of orbitals with time-resolved photoelectron spectroscopy (trPES) will not only allow us to separate the molecular contribution to the trPES signal but also to determine the ultrafast charge-transfer dynamics at the interface. In order to probe structural changes at the interface, we also perform time-resolved XPD at FLASH FEL.

[1] Rossnagel K, et. al., J Phys Cond Matter 23:213001 (2011)