Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 72: 2D Materials beyond graphene: Growth, structure and substrate interaction – Poster (joint session O/TT)

O 72.5: Poster

Wednesday, March 11, 2026, 18:00–20:00, P2

Defects and Initial Approaches to TMDC Heterostructure Growth on PtxTey films — •Isabella Stollberg, Andreas Raabgrund, and M. Alexander Schneider — Universität Erlangen-Nürnberg, 91058 Erlangen, Germany

Transition-metal dichalcogenides (TMDCs) can generally be synthesised either by co-evaporating the metal and chalcogen onto a suitable substrate [1] or by depositing only the chalcogen onto the desired metal surface. Using STM, STS, and DFT, we investigate PtxTey films on Pt(111) prepared via the latter approach. With increasing Te content, different initial growth surface telluride structures are observed, followed by the formation of Pt2Te2 and PtTe2 layers [2]. This contribution focuses on STM and spatially resolved STS analyses of point defects in PtTe2, as well as domain boundaries within a PtTe2 or Pt2Te2 layer. Furthermore, we evaluate the suitability of these telluride films as substrates for TMDC heterostructure growth. First results on attempting to grow TiTe2 and PdTe2 demonstrate considerable intermixing. While TiTe2 islands can be identified by their apparent height and other lattice constants, PdTe2 islands cannot be distinguished from PtTe2 based on topography due to their similar vertical and lateral lattice parameters.

[1] K. Lasek et al., Nano Lett. 22, 23 (2022)
[2] T. Kißlinger et al., Phys. Rev. B 108, 205412 (2023)

Keywords: TMDC; heterostructures; defects; STS; PtTe2