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Investigation of the atomic and electronic structures of highly ordered two-dimensional germanium on Au(111)
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
2017 (English)In: PHYSICAL REVIEW MATERIALS, ISSN 2475-9953, Vol. 1, no 7, article id 074002Article in journal (Refereed) Published
Abstract [en]

Low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), and photoelectron spectroscopy have been used to study an ordered structure formed by Ge atoms deposited onto the Au(111) surface. Based on a careful analysis of STM images and LEED patterns, we propose a ((5)(8) (0)(-14)) unit cell for the atomic structure of the Ge layer. Core-level data indicate that some Ge atoms diffuse into the Au(111) crystal during annealing after deposition at room temperature. This is further corroborated by angle-resolved photoelectron spectroscopy (ARPES) measured for different amounts of Ge remaining after sputtering and annealing. The results of the ARPES study clearly disprove an earlier assignment of a parabolic band, centered at normal emission, as a part of a Dirac cone of germanene.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2017. Vol. 1, no 7, article id 074002
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-144263DOI: 10.1103/PhysRevMaterials.1.074002ISI: 000418775000002OAI: oai:DiVA.org:liu-144263DiVA, id: diva2:1173628
Note

Funding Agencies|Swedish Research Council [621-2014-4764, 2008-6582]

Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-01-12

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Wang, WeiminUhrberg, Roger
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