Dresden 2026 – scientific programme
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O: Fachverband Oberflächenphysik
O 71: 2D Materials: Electronic structure, excitations, etc. – Poster (joint session O/TT)
O 71.13: Poster
Wednesday, March 11, 2026, 18:00–20:00, P2
Engineering correlated electrons in adatom lattices on semiconductors — •Tim Kullick1, Niklas Enderlein1, Henri Menke1,2, Giorgio Sangiovanni3, and Philipp Hansmann1 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg — 2Max Planck Institute for Solid State Research, Stuttgart — 3Julius-Maximilian-Universität of Würzburg
Adatom lattices on (111) surfaces of zinc-blende structured semiconductors have proven to be versatile, experimentally realizable platforms for hosting flat bands with strong electronic correlations near the Fermi energy. A recent study [1] revealed transition metals on 3C-SiC(111) surfaces to be intriguing adatom systems, showcasing the diverse nature of strongly correlated systems. Together with earlier theoretical and experimental studies on adatom lattices on the Si(111) surfaces, this recent work underlines the great potential of this material family. In the present project, we explore promising adatom lattices on semiconducting/insulating substrates such as SiC and cubic BN in order to realize one-, two-, and three-band Hubbard models at different fillings. Combined with estimates of the quasiparticle interaction via cRPA, we point out new material directions in this increasingly vivid field. [1] H.Menke, N.Enderlein, et al., arXiv:2410.17165.
Keywords: adatoms; strong electronic correlations; Hubbard model; dynamical mean-field theory