Evidence for Incomplete Charge Transfer and La-Derived States in the Valence Bands of Endohedrally Doped La{at}C{sub 82}

Journal Article · Mon Sep 01 00:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.2289· OSTI ID:542667

Kessler, B; Bringer, A; Cramm, S; Schlebusch, C; Eberhardt, W ^[1]; Suzuki, S; Achiba, Y ^[2]; Esch, F; Barnaba, M; Cocco, D ^[3]

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1. Forschungszentrum Juelich, IFF, D-52425 Juelich (Germany)
2. Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-03 (Japan)
3. Sincrotrone Trieste, Padriciano 99, Trieste (Italy)

Photoelectron spectra from sublimed layers of chromatographically separated La{at}C{sub 82} are presented. Using photon energies corresponding to the La 3d to 4f transition, a resonant enhancement of the La-derived valence states is observed. From the calculated resonant intensities of La 5d and 5p states in a La atom we estimate that about (1)/(3) of an electron charge is left in the La-valence orbitals for La@C{sub 82} . In contrast to previous interpretations of La core-level photoemission studies our results demonstrate that the La valence electrons are not completely delocalized on the fullerene cage. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 542667
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ELECTRON TRANSFER
FULLERENES
LANTHANUM CARBIDES
LANTHANUM COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
VALENCE