Electron-diffraction and photoelectron-spectroscopy studies of fullerene and alkali-metal fulleride films

Benning, P. J.; Stepniak, F.; Weaver, J. H.

doi:10.1103/physrevb.48.9086

Cited by 126 publications

(45 citation statements)

References 39 publications

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“…The PES spectra of K 3 C 60 show a broad structure around 0.5 eV, which has been attributed to correlationinduced states. 9,[19][20][21][22] High-resolution PES studies of K 3 C 60 at lower temperature revealed presence of a metallic edge with fine structures that have been explained with electronphonon and electron-plasmon interactions. 20,21 Highresolution PES studies at lower temperature of K-doped picene will provide insight into the superconductivity, as in K-doped fullerides.…”

Section: Calcmentioning

confidence: 99%

Electronic structure of pristine and K-doped solid picene: Nonrigid band change and its implication for electron-intramolecular-vibration interaction

et al. 2010

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We use photoemission spectroscopy to study electronic structures of pristine and K-doped solid picene. The valence band spectrum of pristine picene consists of three main features with no state at the Fermi level ͑E F ͒ while that of K-doped picene has three structures similar to those of pristine picene with new states near E F , consistent with the semiconductor-metal transition. The K-induced change cannot be explained with a simple rigid-band model of pristine picene but can be interpreted by molecular-orbital calculations considering electron-intramolecular-vibration interaction. Excellent agreement of the K-doped spectrum with the calculations points to importance of electron-intramolecular-vibration interaction in K-doped picene.

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Section: Calcmentioning

confidence: 99%

Electronic structure of pristine and K-doped solid picene: Nonrigid band change and its implication for electron-intramolecular-vibration interaction

et al. 2010

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“…As an adsorbate on a metal surface, the electronegative C 60 molecule naturally picks up electrons [23,24], and recent evidence has been provided of charge transfer which can be as large as n=6 [17]. In the solid state, finally, there are compounds, covering a wide range of charge transfers, from n=1, as in TDAE + -C − 60 [25] or Rb 1 C 60 [26], n=3, as in K 3 C 60 or Rb 3 C 60 [27], n=4 as in K 4 C 60 [28], n=6 as in Rb 6 C 60 [29], or even higher as in Li 12 C 60 [30,16].…”

Section: The Hamiltonian Includes the Termsmentioning

confidence: 99%

Electron-vibron interactions in charged fullerenes. II. Pair energies and spectra

1994

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The ground state energy shifts and excitation spectra of charged buckminsterfullerene C n− 60 , n = 1, . . . 5 are calculated. The electronvibron Hamiltonian of Part I is extended to include all A g and H g modes with experimentally determined frequencies and theoretically estimated coupling constants. Complex splitting patterns of H g vibrational levels are found. Our results are relevant to EPR measurements of spin splittings in C 2− 60 and C 3− 60 in solution. Spectroscopic gas-phase experiments will be of interest for further testing of this theory. As found in Part I, degeneracies in the electron and vibron Hamiltonians give rise to a dynamical Jahn Teller effect, and to a considerable * Email: manini@tsmi19.sissa.it † Email: tosatti@tsmi19.sissa.it ‡ Email: assa@phassa.technion.ac.il 1 enhancement of the electronic pairing interaction. This helps to overcome repulsive Coulomb interactions and has important implications for superconductivity in K 3 C 60 and the insulating state in K 4 C 60 .

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“…However, even for these large grains, small misalignments with the substrate were observed. This was attributed to the relatively large misfit between the lattice parameters of the overlayer and the substrate, 19,30 but was never studied in detail. The rotation angles observed for C 60 and C 70 films grown on GeS ͑001͒ are summarized in Table I.…”

Section: Discussionmentioning

confidence: 99%

“…Heating the substrate resulted in well-ordered films with domain sizes exceeding 100 nm. 15,17,19,20 The best crystalline quality was obtained for films grown on lamellar substrates like GeS͑001͒, 18,21 GaSe͑0001͒, 22,23 MoS 2 ͑0001͒, 22,[24][25][26] and mica͑001͒. [27][28][29][30][31] The low surface energy of these materials and the absence of unsaturated chemical bonds at their surface relax the lattice matching conditions required for epitaxial growth and favor surface diffusion of the deposited molecules.…”

mentioning

confidence: 99%

Structural defects and epitaxial rotation of C60 and C70(111) films on GeS(001)

Bernaerts

Tendeloo

Amelinckx

et al. 1996

Journal of Applied Physics

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A transmission electron microscopy study of epitaxial C 60 and C 70 films grown on a GeS ͑001͒ surface is presented. The relationship between the orientation of the substrate and the films and structural defects in the films, such as grain boundaries, unknown in bulk C 60 and C 70 crystals, are studied. Small misalignments of the overlayers with respect to the orientation of the substrate, so-called epitaxial rotations, exist mainly in C 70 films, but also sporadically in the C 60 overlayers. A simple symmetry model, previously used to predict the rotation of hexagonal overlayers on hexagonal substrates, is numerically tested and applied to the present situation. Some qualitative conclusions concerning the substrate-film interaction are deduced.

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Electron-diffraction and photoelectron-spectroscopy studies of fullerene and alkali-metal fulleride films

Cited by 126 publications

References 39 publications

Electronic structure of pristine and K-doped solid picene: Nonrigid band change and its implication for electron-intramolecular-vibration interaction

Electronic structure of pristine and K-doped solid picene: Nonrigid band change and its implication for electron-intramolecular-vibration interaction

Electron-vibron interactions in charged fullerenes. II. Pair energies and spectra

Structural defects and epitaxial rotation of C60 and C70(111) films on GeS(001)

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