Structure of the (010) surface of the orthorhombic complex metallic alloy T-Al-3(Mn,Pd)
- Author(s)
- Thalia Deniozou, Rafik Addou, Ajay Shukla, Marc Heggen, Michael Feuerbacher, Marian Krajci, Juergen Hafner, Roland Widmer, Oliver Gröning, V. Fournee, Jean-Marie Dubois, J Ledieu
- Abstract
The atomic and electronic structures of the (010) surface of the T-Al-3(Mn,Pd) complex metallic alloy is investigated by means of low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), x-ray and ultraviolet photoelectron spectroscopy (XPS and UPS), x-ray photoelectron diffraction (XPD), and ab initio calculations. While structural imperfections are observed at the surface and out of the various possible terminations, the puckered P2 layer is identified as the only surface termination, thus pointing out the existence of a well-defined minimum in the surface energy landscape. The measured step heights correspond to distances between identical planes along the [010] direction in the bulk model, i.e., b/2. A bias dependency of the STM topography is found. The XPD and LEED patterns confirm the pseudotenfold symmetry of the sample. XPS and UPS show a more metallic signature of the T phase compared to Al-based quasicrystalline phases.
- Organisation(s)
- Computational Materials Physics
- External organisation(s)
- Université Paul-Valéry Montpellier 3, Forschungszentrum Jülich, Slovenian Academy of Sciences and Arts, Eidgenössische Materialprüfungs- und Forschungsanstalt, Ecole des Mines de Nancy
- Journal
- Physical Review B
- Volume
- 81
- No. of pages
- 12
- ISSN
- 1098-0121
- DOI
- https://doi.org/10.1103/PhysRevB.81.125418
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/99ebb601-9724-4b38-ad7e-54594308baec