Regensburg 2022 – scientific programme
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O: Fachverband Oberflächenphysik
O 55: Poster Wednesday: Organic Molecules at Surfaces 2
O 55.15: Poster
Wednesday, September 7, 2022, 18:00–20:00, P4
Electronic properties of CuPc/TiSe2 heterostructures — •Hibiki Orio1,2, Kiana Baumgärtner1,2, Christian Metzger1,2, Markus Scholz3,4, Kai Rossnagel4,5, and Friedrich Reinert1,2 — 1Universität Würzburg Experimentelle Physik VII, Würzburg, Germany — 2Würzburg-Dresden Cluster of Excellence ct.qmat, Würzburg Dresden, Germany — 3European XFEL Facility, Schenefeld, Germany — 4Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 5KiNSIS, Universität Kiel, Kiel, Germany
Transition metal dichalcogenides (TMDC) are a class of quasi-2D materials that exhibit a variety of electronic properties including superconductive, excitonic insulator, and charge-density wave (CDW) phases. TiSe2 is one of the most prominent TMDC because it has intriguing CDW properties. The physical process of the CDW is not fully understood, however, and is attributed to either be purely electron-electron or jointly electron-electron and electron-phonon mediated. To gain more insight into the CDW buildup, modulating the intrinsic physical properties is useful [1]. For this purpose, we have used organic molecules as several interactions such as charge transfer or a rearrangement of the electron density can modulate the electronic properties at the organic/TMDC interface. We have evaporated copper phthalocyanine (CuPc) on TiSe2 single crystals. We report the perturbed electronic characteristics of the resulting CuPc/TiSe2 heterostructure examined with angle-resolved and X-ray photoelectron spectroscopy.
[1] K. Baumgärtner et al., submitted.