Universität zu Köln

Jolie, Wouter, Craes, Fabian and Busse, Carsten ORCID: 0000-0001-5522-0578 (2015). Graphene on weakly interacting metals: Dirac states versus surface states. Phys. Rev. B, 91 (11). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1550-235X

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Abstract

We investigate the interplay between graphene and different, weakly interacting metal substrates by measuring the local density of states of the surface with scanning tunneling spectroscopy. Energy-resolved Friedel oscillations, confined states, and a prominent signal in point spectra are found after intercalating several monolayers of silver between graphene and Ir(111) and correspond to the shifted surface state of silver. These features outweigh spectroscopic signatures of graphene, which are retrieved when the amount of silver is reduced to one monolayer. Hence, suppressing the surface states of the metal substrate enhances the sensitivity to the Dirac states of quasi-free-standing graphene.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Jolie, Wouter UNSPECIFIED UNSPECIFIED UNSPECIFIED Craes, Fabian UNSPECIFIED UNSPECIFIED UNSPECIFIED Busse, Carsten UNSPECIFIED orcid.org/0000-0001-5522-0578 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-409861
DOI:	10.1103/PhysRevB.91.115419
Journal or Publication Title:	Phys. Rev. B
Volume:	91
Number:	11
Date:	2015
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 ATOMIC-SCALE STRUCTURE; EPITAXIAL GRAPHENE; TUNNELING SPECTROSCOPY; LOCAL-DENSITY; AG(111); GROWTH; LAYER; FILMS; NANOCLUSTERS; CONFINEMENT Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/40986