Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 42: Electronic structure of surfaces: Spectroscopy, surface states – Poster

O 42.6: Poster

Dienstag, 10. März 2026, 14:00–16:00, P2

Line-Moiré Phases of an Epitaxial Honeycomb Monolayer AgTe/Ag(111) — •Romana Ganser — Exp. Physik VII and Würzburg-Dresden Cluster of Excellence ctd.qmat, Universität Würzburg

Moiré heterostructures offer a versatile platform for engineering electronic band structures by precise control over long-range superlattice potentials that particularly give rise to emergent phenomena [1]. Here, we present angle-resolved photoemission spectroscopy (ARPES) measurements on a highly tunable one-dimensional (1D) epitaxial moiré heterostructure. We show that the electronic structure is strongly altered by the moiré superlattice hosting replica bands and sizable hybridization gaps. From our experimental data, we can trace back to the local, spatially-varying interlayer coupling, shaping the moiré potential. The latter leads to a 1D confinement of the electrons and, interestingly, also gives rise to Dirac nodal lines, which are robustly protected by the superlattice symmetry.

[1] Balents, L. et al. Nat. Phys. 16, 725-733 (2020).

Keywords: ARPES; AgTe; moiré heterostructure