Preprint

FZJ-2025-02315

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Vertical structure of Sb-intercalated quasifreestanding graphene on SiC(0001)

Lin, Y.-R.FZJ* ; Wolff, S.Extern* ; Schädlich, P.Extern* ; Hutter, M.FZJ* ; Soubatch, S.FZJ* ; Lee, T.-L.Extern* ; Tautz, F. S.FZJ* ; Seyller, T.Extern* ; Kumpf, C.FZJ* ; Bocquet, F. C. (Corresponding author)FZJ*

2021
arXiv

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Please use a persistent id in citations: doi:10.48550/ARXIV.2111.08926

Abstract: Using the normal incidence x-ray standing wave technique as well as low energy electron microscopy we have investigated the structure of quasi-freestanding monolayer graphene (QFMLG) obtained by intercalation of antimony under the $\left(6\sqrt{3}\times6\sqrt{3}\right)R30^\circ$ reconstructed graphitized 6H-SiC(0001) surface, also known as zeroth-layer graphene. We found that Sb intercalation decouples the QFMLG well from the substrate. The distance from the QFMLG to the Sb layer almost equals the expected van der Waals bonding distance of C and Sb. The Sb intercalation layer itself is mono-atomic, flat, and located much closer to the substrate, at almost the distance of a covalent Sb-Si bond length. All data is consistent with Sb located on top of the uppermost Si atoms of the SiC bulk.

Keyword(s): Materials Science (cond-mat.mtrl-sci) ; FOS: Physical sciences

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Contributing Institute(s):

1. Quantum Nanoscience (PGI-3)

Research Program(s):

1. 5213 - Quantum Nanoscience (POF4-521) (POF4-521)

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