Abstract

We have grown an atom-thin, ordered, two-dimensional multi-phase film in situ through germanium molecular beam epitaxy using a gold (111) surface as a substrate. Its growth is similar to the formation of silicene layers on silver (111) templates. One of the phases, forming large domains, as observed in scanning tunneling microscopy, shows a clear, nearly flat, honeycomb structure. Thanks to thorough synchrotron radiation core-level spectroscopy measurements and advanced density functional theory calculations we can identify it as a root 3 x root 3 R(30 degrees) germanene layer in conjunction with a root 7 x root 7 R(19.1 degrees) Au(111) supercell, presenting compelling evidence of the synthesis of the germanium-based cousin of graphene on gold.

Keywords

SiliceneGermaneneGermaniumScanning tunneling microscopePhysicsGrapheneCondensed matter physicsSubstrate (aquarium)SuperlatticeDensity functional theorySynchrotron radiationEpitaxyMolecular beam epitaxyCrystallographyNanotechnologyLayer (electronics)SiliconOpticsMaterials scienceOptoelectronicsQuantum mechanics

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Publication Info

Year
2014
Type
article
Volume
16
Issue
9
Pages
095002-095002
Citations
1541
Access
Closed

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Cite This

M. E. Dávila, Lede Xian, Seymur Cahangirov et al. (2014). Germanene: a novel two-dimensional germanium allotrope akin to graphene and silicene. New Journal of Physics , 16 (9) , 095002-095002. https://doi.org/10.1088/1367-2630/16/9/095002

Identifiers

DOI
10.1088/1367-2630/16/9/095002
arXiv
1406.2488

Data Quality

Data completeness: 84%