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Title

Electron-electron correlation in graphite: a combined angle-resolved photoemission experiments and ab-initio calculations

AuthorsGrüneis, Alexander; Rubio, Angel
Issue Date22-Jan-2008
PublisherAmerican Physical Society
CitationPhysical Review Letters 100: 37601 (2008)
AbstractThe full three-dimensional dispersion of the π bands, Fermi velocities, and effective masses are measured with angle-resolved photoemission spectroscopy and compared to first-principles calculations. The band structure by density-functional theory underestimates the slope of the bands and the trigonal warping effect. Including electron-electron correlation on the level of the GW approximation, however, yields remarkable improvement in the vicinity of the Fermi level. This demonstrates the breakdown of the independent electron picture in semimetallic graphite and points toward a pronounced role of electron correlation for the interpretation of transport experiments and double-resonant Raman scattering for a wide range of carbon based materials.
DescriptionPACS nrs.: 79.60.-i, 71.10.-w, 71.20.Tx, 71.55.Ak.p.-- et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.100.037601
URIhttp://hdl.handle.net/10261/7292
DOI10.1103/PhysRevLett.100.037601
ISSN0031-9007
Appears in Collections:(CFM) Artículos




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