Growth and crystallographic structure of TiTe2 on Au(111): From submonolayer structures to single- and multilayer films

Raabgrund A, Kißlinger T, Wegerich A, Hammer L, Schneider MA (2026)

Publication Type: Journal article

Publication year: 2026

Journal

Book Volume: 113

Article Number: 195426

Journal Issue: 19

DOI: 10.1103/XYDG-J877

Abstract

We investigated the initial growth of TiTe2 on Au(111) from submonolayer to multilayer coverage by scanning tunneling microscopy (STM), low-energy electron diffraction intensity analysis (LEED-IV), and density functional theory. In the submonolayer regime, we find a stable and well-ordered (5 × ^√3)rect superstructure consisting of separated TiTe2 molecules, whereby the Ti atoms substitute Au atoms of the first substrate layer as proven by LEED-IV. By adding further Ti and Te in a 1:2 ratio and proper annealing dealloying sets in and a homogeneous 1T-TiTe2 monolayer film on an unreconstructed substrate is formed. The resulting moiré structure is close to a (4 × 4) superstructure with respect to Au(111) and has a slightly expanded in-plane lattice parameter compared to the 1T-TiTe2 bulk value. With further stoichiometric deposition, thicker 1T-TiTe2 films grow. Surprisingly, a five-layer thick film exhibits an even larger lattice parameter (1.5 % larger than the bulk value). All LEED-IV analyses are based on best-fit R factors of R ⩽ 0.13.

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How to cite

APA:

Raabgrund, A., Kißlinger, T., Wegerich, A., Hammer, L., & Schneider, M.A. (2026). Growth and crystallographic structure of TiTe2 on Au(111): From submonolayer structures to single- and multilayer films. Physical Review B, 113(19). https://doi.org/10.1103/XYDG-J877

MLA:

Raabgrund, Andreas, et al. "Growth and crystallographic structure of TiTe2 on Au(111): From submonolayer structures to single- and multilayer films." Physical Review B 113.19 (2026).

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