Blanc, Nils, Coraux, Johann, Vo-Van, Chi, N'Diaye, Alpha T., Geaymond, Olivier and Renaud, Gilles (2012). Local deformations and incommensurability of high-quality epitaxial graphene on a weakly interacting transition metal. Phys. Rev. B, 86 (23). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

Full text not available from this repository.

Abstract

We investigate the fine structure of graphene on iridium, which is a model for graphene weakly interacting with a transition-metal substrate. Even the highest-quality epitaxial graphene displays tiny imperfections, i.e., small biaxial strains of similar to 0.3%, rotations of similar to 0.5 degrees, and shears over distances of similar to 100 nm, and is found incommensurate, as revealed by x-ray diffraction and scanning tunneling microscopy. These structural variations are mostly induced by the increase of the lattice parameter mismatch when cooling the sample from the graphene preparation temperature to the measurement temperature. Although graphene weakly interacts with iridium, its thermal expansion is found to be positive, contrary to free-standing graphene. The structure of graphene and its variations is very sensitive to the preparation conditions. All these effects are consistent with initial growth and subsequent pinning of graphene at steps. DOI: 10.1103/PhysRevB.86.235439

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Blanc, NilsUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coraux, JohannUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vo-Van, ChiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
N'Diaye, Alpha T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Geaymond, OlivierUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Renaud, GillesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-476463
DOI: 10.1103/PhysRevB.86.235439
Journal or Publication Title: Phys. Rev. B
Volume: 86
Number: 23
Date: 2012
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CHEMICAL-VAPOR-DEPOSITION; GRAINSMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/47646

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item