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- W2019954465 abstract "Optical absorption below and near the interband absorption edge has been measured from helium temperatures up to the molten state of As2S3 Irreversible changes in absorption below the band edge suggest that heating above 530 K produces defect states in crystalline As2S3. The exponential absorption tail and thus the absorption edge is temperature independent t o about 200K. Between 300 and 400K it decreases a t a rate of about 1.6 × 10−3, eV/K. This temperature dependence is predominantly caused by electron-phonon interaction. Die optische Absorptionskonstante von As2S3, wurde im Bereich der Bandkante zwischen Heliumtemperaturen und dem Schmelzzustand gemessen. Irreversible Anderungen in der Absorption unterhalb der Bandkante legen nahe, daß sich oberhalb 530 K Defektstellen in As2S3, -Kristallen bilden. Die der Bandkante vorgelagerte exponentiell ansteigende Absorptionskurve und somit die Lage der Bandkante ist teinperaturunabhsngig his hinauf zu 200 K. Zwischen 300 und 400 K verschiebt sich die Absorptionskante zu kleineren Photonenenergien mit einem Temperaturkoeffizienten von etwa 1,6 × 10−3, eV/K. Diese Temperaturabhangigkeit ist weitgehend durch die Elektronen-Phononen-Wechselwirkung bedingt." @default.
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- W2019954465 date "1974-07-01" @default.
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- W2019954465 title "Temperature Dependence of the Absorption Edge in Crystalline and Vitreous As<sub>2</sub>S<sub>3</sub>" @default.
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- W2019954465 doi "https://doi.org/10.1002/pssb.2220640116" @default.
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