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TT: Fachverband Tiefe Temperaturen
TT 16: 2D Materials beyond graphene: Growth, structure and substrate interaction (joint session O/HL/TT)
TT 16.1: Vortrag
Montag, 9. März 2026, 15:00–15:15, HSZ/0204
A virtual super-moiré: MnBr2 on graphene on Ir(110) — Affan Safeer1, Oktay Güleryüz1, Nicolae Atodiresei2, •Thomas Michely1, and Jeison Fischer1 — 1II. Physikalisches Institut, Universität zu Köln, Germany — 2Peter Grünberg Institut, Forschungszentrum Jülich, Germany
MnBr2 on Gr/Ir(110) constitutes a three lattice system, giving rise to a super-moiré pattern – a moiré of moirés. The super-moiré of Gr/MnBr2/Ir(110) is unique, as it involves a virtual moiré of MnBr2 with the Ir(110) surface lattice – two lattices not in contact with each other. Using a careful Fourier analysis of the bias dependence of scanning tunneling microscope topographs, scanning tunneling spectroscopy, the known properties of Gr/Ir(110), and the results of ab initio calculations, the origin of the virtual moiré is uncovered and related to the inhomogeneous binding of Gr to Ir(110). Comparative experiments with MnBr2 on Gr/Ir(111) show similar growth and structure as on Gr/Ir(110), but highlight the unique properties of the MnBr2/Gr/Ir(110) super-moiré.
Keywords: 2D materials; Moiré; STM; managnese dibromide