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          Institute: Fritz-Haber-Institut     Collection: Theory     Display Documents



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ID: 446208.0, Fritz-Haber-Institut / Theory
Angle-resolved photoemission study of the graphite intercalation compound KC8: A key to graphene
Authors:Grüneis, A.; Attaccalite, C.; Rubio, Angel; Vyalikh, D. V.; Molodtsov, Sergeij L.; Fink, J.; Follath, R.; Eberhardt, W.; Büchner, B.; Pichler, T.
Language:English
Date of Publication (YYYY-MM-DD):2009-08-27
Title of Journal:Physical Review B
Journal Abbrev.:Phys. Rev. B
Volume:80
Issue / Number:7
Start Page:075431-1
End Page:075431-5
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Electrons in isolated graphene layers are a two-dimensional gas of massless Dirac Fermions. In realistic devices, however, the electronic properties are modified by elastic deformations, interlayer coupling and substrate interaction. Here, we unravel the electronic structure of noninteracting, doped graphene layers by revisiting the stage one graphite intercalation compound KC8. To this end we apply angle-resolved photoemission spectroscopy and ab initio calculations. The full experimental dispersion is in excellent agreement with calculations of doped graphene once electron correlations are included at the GW level (Greens function G of the Coulomb interaction W). This highlights that KC8 has negligible interlayer coupling allowing us to access the full experimental Dirac cone.
External Publication Status:published
Document Type:Article
Communicated by:Matthias Scheffler
Affiliations:Fritz-Haber-Institut/Theory
External Affiliations:Faculty of Physics, Vienna University, Strudlhofgasse 4, 1090 Wien, Austria

IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany

Nano-Bio Spectroscopy Group and ETSF Scientific Development Centre, Dpto. Física de Materiales, Universidad del País Vasco, Centro de Física de Materiales CSIC-UPV/EHU-MPC and DIPC, Av. Tolosa 72, E-20018 San Sebastián, Spain

Institut für Festkörperphysik, TU Dresden, Mommsenstrasse 13, D-01069 Dresden, Germany

Helmholtz-Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
Identifiers:URL:http://dx.doi.org/10.1103/PhysRevB.80.075431 [only subscriber]
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