Universität zu Köln

Runte, Sven, Lazic, Predrag, Vo-Van, Chi, Coraux, Johann, Zegenhagen, Joerg and Busse, Carsten ORCID: 0000-0001-5522-0578 (2014). Graphene buckles under stress: An x-ray standing wave and scanning tunneling microscopy study. Phys. Rev. B, 89 (15). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1550-235X

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Abstract

Graphene on Ir(111) is studied using scanning tunneling microscopy (STM) and x-ray standing waves (XSW). The graphene layer has a corrugated shape due to the moire pattern formed as a result of a spatially varying interaction strength between graphene and its substrate. The coherent fraction F-(111) determined in XSW allows us to determine the amplitude of this intrinsic corrugation when the incoherent contributions of wrinkles, step edges, graphene edges, and contaminations are taken into account. The corrugation is found to depend on the stress state of the carbon sheet. Using density functional theory (DFT) calculations, we show that graphene can compensate stress by increasing its corrugation rather than by a reduction of the C-C bond length.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Runte, Sven UNSPECIFIED UNSPECIFIED UNSPECIFIED Lazic, Predrag UNSPECIFIED UNSPECIFIED UNSPECIFIED Vo-Van, Chi UNSPECIFIED UNSPECIFIED UNSPECIFIED Coraux, Johann UNSPECIFIED UNSPECIFIED UNSPECIFIED Zegenhagen, Joerg UNSPECIFIED UNSPECIFIED UNSPECIFIED Busse, Carsten UNSPECIFIED orcid.org/0000-0001-5522-0578 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-440436
DOI:	10.1103/PhysRevB.89.155427
Journal or Publication Title:	Phys. Rev. B
Volume:	89
Number:	15
Date:	2014
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1550-235X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EPITAXIAL GRAPHENE; PHOTOELECTRON-SPECTROSCOPY; IR(111); STRAIN; CHEMISORPTION; INTERCALATION; IRIDIUM; METALS; EDGES Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44043