Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 38: Poster 2D Materials: Stacking and Heterostructures (joint session O/HL)

O 38.3: Poster

Tuesday, March 18, 2025, 13:30–15:30, P3

A Two-dimensional Heterostructure Fabrication System in Ultra-high Vacuum — •Daiyu Geng, Jiabao Yang, Natalie Lehmann, and Niels Schröter — Max Planck Institute of Microstructure Physics, Weinberg 2, Halle (Saale), Germany

We develop an ultra-high vacuum system for the fabrication of two-dimensional heterostructures. The clean transfer and stacking of two dimensional material flakes are realized using a polymer-free method based on SiNx cantilevers coated with Au film (Nature Electronics, 2023, 6(12): 981-990). The system also incorporates multiple surface preparation and characterization techniques like MBE, Plasma sputtering and electron diffraction. All these methods enable us to prepare heterostructures with atomically clean interface, which is important for the spectroscopic investigation of the rich physics effects in two-dimensional heterosystems.

Keywords: 2D materials; Heterostructure; Ultra-high vacuum