Petrovic, Marin ORCID: 0000-0002-2234-1207, Lazic, Predrag, Runte, Sven, Michely, Thomas, Busse, Carsten ORCID: 0000-0001-5522-0578 and Kralj, Marko ORCID: 0000-0002-9786-3130 (2017). Moire-regulated self-assembly of cesium adatoms on epitaxial graphene. Phys. Rev. B, 96 (8). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Upon adsorption onto epitaxial graphene on Ir( 111) at room temperature, Cs adatoms donate part of their charge to the substrate, which effectively creates mutually repelling entities that can diffuse across the graphene surface. By using scanning tunneling microscopy at 6 K, an ordered hexagonal structure of Cs adatoms with several rotated domains has been identified. The amount of charge transferred to graphene has been determined from the presented valence-b band photoemission data. Density-functional calculations show that the repulsive interaction is additionally modulated by preferential adsorption of Cs to the atop region within the moire unit cell. Our results provide direct atomistic insight into the self-assembly of individual atoms on epitaxial graphene, and they demonstrate how the moire structure acts as a perturbation to that process.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Petrovic, MarinUNSPECIFIEDorcid.org/0000-0002-2234-1207UNSPECIFIED
Lazic, PredragUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Runte, SvenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Michely, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Busse, CarstenUNSPECIFIEDorcid.org/0000-0001-5522-0578UNSPECIFIED
Kralj, MarkoUNSPECIFIEDorcid.org/0000-0002-9786-3130UNSPECIFIED
URN: urn:nbn:de:hbz:38-221601
DOI: 10.1103/PhysRevB.96.085428
Journal or Publication Title: Phys. Rev. B
Volume: 96
Number: 8
Date: 2017
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
GRAPHITE 0001; MONOLAYER; ADSORPTION; GROWTH; METALS; GAS; CSMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/22160

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