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  • 71.45.Gm  (1)
  • 74.72Bk  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Preparation and electronic structure of phase pure K3C60 (1995)
    Springer
    The European physical journal 98 (1995), S. 9-15 
    Details
    ISSN: 1434-6036
    Keywords: 68.55.Gi ; 71.20.Hk ; 71.45.Gm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Phase pure K3C60 films have been grown using vacuum distillation. The structure of such films could be shown to be face centered cubic consistent with X-ray diffraction studies. The electronic structure of the films has been studied using electron energy-loss spectroscopy in transmission. From C1s core excitation measurements the unoccupied density of states has been determined. Performing the dielectric function has been derived in a wide energy range (0–45 eV). It is shown that the low energy part of the optical conductivity cannot be understood within a simple free electron model but that interband transitions between the three conduction bands have to be taken into account. The spectral weight of interband transitions between valence and conduction bands shows strong momentum dependence due to optical selection rules demonstrating the molecular-like nature of the electronic states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01318272
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  • 2
    Electronic Resource
    Electronic Resource
    Dielectric properties of YNi2B2C (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 1659-1664 
    Details
    ISSN: 1573-7357
    Keywords: 74.72Bk ; 78.00 ; 79.20Kz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dielectric function of the quarternary superconductor YNi2B2C has been derived in an energy range from WmeV up to 50eV by linking together optical reflectance and electron energy loss measurements, obtained from polycrystalline samples at room temperature. The low energy part of the spectrum was additionally investigated in a temperature range from 10K up to 300K. In order to determine the anisotropy of this compound, the reflectance spectra of a single crystal were taken, using polarized light with polarization along the crystallographic axes. The single crystal data exhibit a normal Drude-like metallic behaviour, while the polycrystalline data can only be interpreted by means of a strong energy dependent scattering rate, which has been interpreted as resulting from strong electron-phonon coupling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00753938
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    Paper (German National Licenses)
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