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Nano-scale 3D (E,kx,ky) band structure imaging on graphene and intercalated graphene
MAX-lab, Lund University.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
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2011 (English)In: IBM Journal of Research and Development, ISSN 0018-8646, E-ISSN 2151-8556, Vol. 55, no 4, 6:1-6:6 p.Article in journal (Refereed) Published
Abstract [en]

An x-ray photoemission electron microscope (X-PEEM) equipped with a hemispherical energy analyzer is capable of fast acquisition of momentum-resolved photoelectron angular distribution patterns in a complete cone. We have applied this technique to observe the 3-D $(E, k_{x}, k_{y})$ electronic band structure of zero-, one-, and two-monolayer (ML) graphene grown ex situ on 6H-SiC(0001) substrates where a carbon buffer layer (zero ML) forms underneath the graphene layer(s). We demonstrate that the interfacial buffer layer can be converted into quasi-free-standing graphene upon intercalation of Li atoms at the interface and that such a graphene is structurally and electronically decoupled from the SiC substrate. High energy and momentum resolution of the X-PEEM, along with short data acquisition times from submicrometer areas on the surface demonstrates the uniqueness and the versatility of the technique and broadens its impact and applicability within surface science and nanotechnology.

Place, publisher, year, edition, pages
IBM Corporation , 2011. Vol. 55, no 4, 6:1-6:6 p.
Keyword [en]
Atomic layer deposition, Buffer layers, Electron microscopy, Energy resolution, Nanoscale devices, Photoelectricity, Substrates
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-73575DOI: 10.1147/JRD.2011.2143570ISI: 000301500600008OAI: oai:DiVA.org:liu-73575DiVA: diva2:474690
Note
funding agencies|Swedish National Energy Administration||Available from: 2012-01-09 Created: 2012-01-09 Last updated: 2017-12-08

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Virojanadara, ChariyaWatcharinyanon, SomsakulYakimova, RositsaJohansson, Leif

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Virojanadara, ChariyaWatcharinyanon, SomsakulYakimova, RositsaJohansson, Leif
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