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  • 1985-1989  (3)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    A quantitative study of the creation of EL2 defects in GaAs by plastic deformation (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1516-1520 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Optical absorption quenching measurements have been carried out on a lot of plastically deformed n+ samples (either Si or Se doped), which were EL2 free before deformation. It is shown that the density of EL2 defects created during the deformation increases linearly first with the dislocation density and then saturates for higher strains. The introduction rate of EL2 is also higher in the Se- than in the Si-doped material. Photoluminescence characterization of these same samples shows the appearance of the 0.93-eV band only after deformation; this band being associated with the divacancy. A possible model of EL2 creation during deformation is finally proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343421
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Charged dislocation induced optical absorption in GaAs (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1261-1264 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We propose a model of optical absorption induced by electric fields resulting from charged dislocations. It is shown to account satisfactorily for the deformation induced absorption in GaAs, which exhibits the shift of the band-to-band transitions often observed in semiconductors. This model considers that dislocations introduce energy levels in GaAs and its implications should be rather general for most semiconductors in which dislocations introduce energy levels in the band gap.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343020
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Matter effects for solar neutrino oscillations (1986)
    Springer
    The European physical journal 32 (1986), S. 499-511 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Possible solar neutrino oscillations are reviewed in the two-neutrino case taking into account the effect of coherent forward scattering when neutrinos travel through the sun and earth. As recently pointed out by Mikheyev and Smirnov this effect can induce a large suppression of the solar νe flux for values of Δm 2 around 10−4–10−8 eV2 even for small values of the mixing angle. It also may cause substantial modifications of the solar neutrino spectrum shape. All this may be used for determining Δm 2 and sin2 2θ in a large domain from the experimental results of the chlorine, gallium, indium and heavy water detectors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01550771
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    Paper (German National Licenses)
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