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

AutorGrüneis, Alexander; Rubio, Angel
Fecha de publicación22-ene-2008
EditorAmerican Physical Society
CitaciónPhysical Review Letters 100: 37601 (2008)
ResumenThe 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.
DescripciónPACS nrs.: 79.60.-i, 71.10.-w, 71.20.Tx, 71.55.Ak.p.-- et al.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.100.037601
URIhttp://hdl.handle.net/10261/7292
DOI10.1103/PhysRevLett.100.037601
ISSN0031-9007
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