Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 66: 2D Materials: Electronic structure, excitations, etc. – Poster (joint session O/TT)
TT 66.17: Poster
Wednesday, March 11, 2026, 18:00–20:00, P2
Probing Electronic Structure Modulation in WSe2 and MoTe2 under Out-of-Plane Electric Fields via ARPES and XPS — •Sonja Reinheimer1,2, Lukas Bruckmeier1,2, Jakob Dilling1,2, Jens Buck1,2, Matthias Kalläne1,2,3, Chithra Sharma1,2,4, Markus Scholz5, and Kai Rossnagel1,2,3 — 1IEAP, CAU Kiel, 24098 Kiel, Germany — 2RHL, DESY, 22607 Hamburg, Germany — 3KiNSIS, CAU Kiel, 24098 Kiel, Germany — 4Universität Hamburg, 22761 Hamburg, Germany — 5DESY, 22607 Hamburg, Germany
Transition metal dichalcogenides (TMDCs) are quantum materials that exhibit a broad spectrum of emergent electronic phenomena, arising from layer-dependent band structures. Owing to their tunable (opto-)electronic properties, TMDCs are promising candidates for next-generation photovoltaic devices and highly integrated electronic components. A key challenge is to systematically control charge transport and band alignment in these layered systems. Here, we investigate vertically stacked 2H-WSe2/2H-MoTe2 heterostructures using angle-resolved photoemission spectroscopy (ARPES) and X-ray photoelectron spectroscopy. By performing in-operando ARPES on a sample with an applied out-of-plane electric field during the measurements, we can directly probe field-induced modifications to the electronic band structure and the density of states. This approach enables us to identify electric-field-driven changes in the electronic and lattice structure and contribute to a deeper understanding of electric control mechanisms in TMDC heterostructures.
Keywords: ARPES; XPS; TMDC; WSe2; MoTe2