Browsing by Author "Koch, Bertram"

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    The electrical anisotropy of the organic metals (BEDT-TTF)3(ClO4)2 and α-(BEDT-TTF)3(NO3)2
    (1987) Koch, Bertram; Geserich, Hans Peter; Ruppel, Wolfgang; Schweitzer, Dieter; Keller, Heimo J.
    We report on the polarized reflectance spectra of the two-dimensional organic metals (BEDT-TTF)3(Cl04)2 and α-(BEDT-TTF)3(N03)2 in the energy range between 0.01 and 5 eV. In contrast to the results obtained on other conducting BEDT-TTF salts, these compounds show high metallic reflectance values at room temperature down to lower energies. In particular, the Cl04-salts can be well described by a two-dimensional Lorentz-Drude model. On the basis of this model the transport parameters along the principal axes are evaluated for both compounds.
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    Optical investigations of the electrical anisotropy of α- and β-(BEDT-TTF)2I3
    (1985) Koch, Bertram; Geserich, Hans Peter; Ruppel, Wolfgang; Schweitzer, Dieter; Dietz, Klaus; Keller, Heimo J.
    The anisotropy of the electrical transport properties at room temperature of the α- and β-phase of (BEDT-TTF)2I3 was determined from the polarized reflectance spectra.
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    Plasma reflectance of the one-dimensional organic metals of the type (arene)2XF6(arene=perylene, pyrene or fluoranthene ; X=P, As, Sb)
    (1983) Geserich, Hans Peter; Koch, Bertram; Ruppel, Wolfgang; Wilckens, Rudolf; Schweitzer, Dieter; Enkelmann, Volker; Wegner, Gerhard; Wieners, Gerhard; Keller, Heimo J.
    We have investigated the spectral position and the form of the plasma edge of different radical cation salts of the type (arene)zXF, independence of the type of the organic donor molecule, and of the charge transfer between donor and acceptor molecules.