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Electron-electron correlation in graphite: A combined angle-resolved photoemission and first-principles study
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2008 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 100, no 3, 037601- p.Article in journal (Refereed) Published
Abstract [en]

The full three-dimensional dispersion of the pi 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.

Place, publisher, year, edition, pages
2008. Vol. 100, no 3, 037601- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-112441DOI: 10.1103/PhysRevLett.100.037601ISI: 000252698100091OAI: oai:DiVA.org:uu-112441DiVA: diva2:286203
Available from: 2010-01-14 Created: 2010-01-13 Last updated: 2017-12-12Bibliographically approved

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