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Title: Two‐dimensional wetting layer structures of reduced ternary oxides on Ru(0001) and Pt(111)
Author(s): Zollner, Eva Maria
Schuster, Fabian
Meinel, Klaus
Krause, Philine
Schenk, Sebastian
Allner, Bettina
Förster, Stefan
Widdra, Wolf
Issue Date: 2020
Type: Article
Language: English
Abstract: Long-range ordered structures of reduced oxide films with monolayer thickness derived from BaTiO3 and SrTiO3 on Ru(0001) and Pt(111) are investigated by scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). Upon ultrahigh vacuum annealing at 1100 K, a hexagonal phase is observed for BaTiO3 on Ru(0001), which forms similarly from SrTiO3 on Pt(111). At higher temperatures, a triangle–square tiling called σ-phase develops in the BaTiO3/Ru(0001) system, with a unit cell rotation of 15° against the Ru(0001) substrate. Furthermore, it is shown that this 15° rotated σ-phase also forms in the BaTiO3/Pt(111) system in addition to the already known 8° rotated σ-phase. The results emphasize a strong flexibility in the structural parameters of the reduced oxide wetting layers in response to the substrate interaction strength.
Open Access: Open access publication
License: (CC BY-NC 4.0) Creative Commons Attribution NonCommercial 4.0(CC BY-NC 4.0) Creative Commons Attribution NonCommercial 4.0
Sponsor/Funder: Publikationsfond MLU
Journal Title: Physica status solidi / B
Publisher: Wiley-VCH
Publisher Place: Weinheim
Volume: 257
Issue: 7
Original Publication: 10.1002/pssb.201900655
Appears in Collections:Open Access Publikationen der MLU

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