Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 76: Electronic structure of surfaces: Spectroscopy, surface states II

O 76.1: Talk

Thursday, March 12, 2026, 10:30–10:45, HSZ/0201

Angle-resolved photoemission spectroscopy study on AgTe/Ag/Au(111) heterostructures. — •Muthu P. T. Masilamani, Sophia Munne, Begmuhammet Geldiyev, Maximilian Ünzelmann, and Friedrich Reinert — Experimental Physics VII and Würzburg-Dresden Cluster of Excellence ctd.qmat, Universität Würzburg, Germany

We report a comprehensive angle-resolved photoemission spectroscopy (ARPES) study on the electronic band structure of AgTe/Ag/Au(111) heterostructures. We systematically explore the interplay between Rashba-like spin-split surface states (SS) of AgTe [1] and quantum well states (QWS) of Ag/Au(111) [2] by epitaxially varying the Te coverage and the Ag spacer-layer thickness. This allows us to address the influence of epitaxial composition on the electronic structure. Our measurements reveal decoupling of the Rashba-like SS and QWS, with no observable hybridisation, attributed to their distinct orbital symmetries. Furthermore, we investigate the emergence of moiré reconstruction in the AgTe/Ag/Au(111) heterosystem.

[1] Ünzelmann, M. et al. PRL. 124, 176401 (2020)

[2] Forster, F. et al. PRB. 84, 075412 (2011)

Keywords: Orbital Rashba effect; quantum well states; angle-resolved photoemission spectroscopy; electronic structure; epitaxy