Experimental evidence for 400-meV valence-band dispersion in solid C60

Georg Gensterblum, Jean-Jacques Pireaux, Paul Thiry, Roland Caudano, Thomas BUSLAPS, Robert L. JOHNSON, Guy LE LAY, V. ARISTOV, R. GÜNTHER, Amina TALEB-IBRAHIMI, G. INDLEKOFER, Yves PETROFF

Research output: Contribution to journalArticle

Abstract

Angle-resolved electron distribution curves have been measured for two different excitation energies on heteroepitaxial C60(111) films. At ħω=29 eV, the limited k∥ resolution together with broadening induced by vibronic excitations results in a weak dependence of the peak positions and line shapes of the photoemission features on the emission angle. We demonstrate that at the low photon energy of ħω=8.1 eV the k∥ resolution becomes sufficient to resolve two bands in the feature derived from the highest-occupied molecular orbital which show a dispersion of the order of 400 meV.
Original languageEnglish
Pages (from-to)14756-14759
Number of pages4
JournalPhysical review. B, Condensed matter
Volume48
Issue number19
DOIs
Publication statusPublished - 1993

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