SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 67: Poster: Electronic Structure of Surfaces
O 67.3: Poster
Mittwoch, 29. März 2023, 18:00–20:00, P2/EG
Photoemission study of a Te Kagome adatom lattice on Pt(111) — •Nicolai Taufertshöfer1,2, Begmuhammet Geldiyev1,2, Maximilian Ünzelmann1,2, Andreas Raabgrund3, Tilman Kißlinger3, Lutz Hammer3, M. Alexander Schneider3, Hendrik Bentmann4, and Friedrich Reinert1,2 — 1Experimentelle Physik VII, JMU Würzburg — 2Würzburg-Dresden Cluster of Excellence ct.qmat — 3Lehrstuhl für Festkörperphysik, FAU Erlangen-Nürnberg — 4Center for Quantum Spintronics (QuSpin), NTNU Trondheim
Kagome lattices can host a variety of exotic phenomena such as flat bands, topological Dirac physics, or unconventional superconductivity [1]. In this contribution, we investigate the electronic structure of a Pt(111)-(3x3)-Te structure. This phase corresponds to a Kagome adlayer on a strongly reconstructed Pt(111) surface as determined by quantitative LEED-IV and STM. Utilizing angle-resolved photoemission spectroscopy, we find a Fermi surface with a rich structure stemming from a complex manifold of bulk and surface electronic states. Intending to unravel the influence of the Kagome lattice on the surface electronic band structure, we will carefully analyse and discuss our photoemission data. Particular attention will be on the nature of a band located in the close vicinity of the Fermi level at the center of the surface Brillouin zone.
[1] T. Neupert et al., Nature Physics 18, 137-143 (2022)