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Oscillations in the valence band photoemission spectrum of the heterofullerene C59N: a photoelectron interference phenomenon

Jones, FH; Butcher, MJ; Cotier, BN; Moriarty, P; Beton, PH; Dhanak, VR; Prassides, K; ... Wudl, F; + view all (1999) Oscillations in the valence band photoemission spectrum of the heterofullerene C59N: a photoelectron interference phenomenon. Physical Review B - Condensed Matter , 59 (15) 9834 - 9837. 10.1103/PhysRevB.59.9834. Green open access

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Abstract

The intensities of the two strongest low-binding energy features in the valence-band photoemission spectra of C59N have been observed to oscillate as the photon energy of the exciting radiation is varied. The maxima in the intensity ratio of the two peaks occur at the same photon energies as the maxima in the intensity ratios of the highest occupied molecular orbitals to next highest occupied molecular orbitals (NHOMO) peaks of C60. The amplitude of modulation of the ratio is remarkably similar in both cases. Since the nature of the filled and empty states involved in the photoemission process are different for C59N compared to C60, the current observation therefore supports the proposal that the final state is of negligible importance in the mechanism leading to the oscillations. The intensity variation instead arises from a photoelectron interference effect as a consequence of the spherical environment of the electron emitters within the molecule.

Type: Article
Title: Oscillations in the valence band photoemission spectrum of the heterofullerene C59N: a photoelectron interference phenomenon
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.59.9834
Publisher version: http:dx.doi.org/10.1103/PhysRevB.59.9834
Language: English
Additional information: © 1999 The American Physical Society
Keywords: Biomat, Other, oscillations
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute > Restorative Dental Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/54982
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