Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 33: Graphene: Growth, structure and substrate interaction (joint session O/HL)

O 33.4: Vortrag

Dienstag, 10. März 2026, 11:30–11:45, HSZ/0201

Strain-Induced 2D Pb phases confined between graphene and SiC — •Sergii Sologub^1,2, Markus Gruschwitz¹, Zamin Mamiev¹, Chitran Ghosal¹, and Christoph Tegenkamp¹ — ¹Institut für Physik, TU Chemnitz, Reichenhainer Str. 70, 09126 Chemnitz — ²Institute of Physics, NAS of Ukraine, Nauki avenue 46, 03028 Kyiv

The intercalation of metals beneath graphene offers a powerful route to stabilizing and protecting novel 2D phases. We performed a detailed intercalation study of Pb beneath the ZLG on SiC(0001) using low-energy electron diffraction (at the temperatures from 70 to 600^∘ C) as well as scanning electron and tunneling microscopy [1]. Our analysis reveals the formation of different 2D Pb monolayer phases, such as stripes and hexagons, which emerge due to the interplay between substrate pinning and strain within the Pb layer, depending on local coverage. The interface reconstruction of Pb was shown can be tuned by varying the details of the intercalation protocol. Based on our experiments combined with recent simulations [2], an intercalation model, accounting for the different periodicities observed in the interface layer, was proposed. These findings provide new insights into the strain-driven stabilization of intercalated metal layers and highlight the potential of graphene as a versatile platform for engineering low-dimensional materials.

[1] Adv. Mater. Interfaces 12, no. 21: e00617 (2025); [2] Appl. Surf. Sci. 681, 161572 (2025).

Keywords: epitaxial graphene; intercalation; lead