AC conductivity of (As2Te3)95Ge5 |
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Authors: | X. Le Cleac h,J.F. Palmier |
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Affiliation: | CPM-PMT, C.N.E.T., Route de Trégastel, 22301 Lannion, France |
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Abstract: | The elctrical conductivity of amorphous chalcogenide (As2Te3)95Ge5 is investigated at variable frequency, from 1 kHz up to 35 GHz, and a variable temperature, from 77 to 300 K. The low-temperature conductivity is constant with temperature at a fixed frequency. At a fixed temperature, it obeys a ω0.8 law only at low frequencies. The results are analysed with respect to the polaron problem, but also with a simple model of several dilute localized levels having a wide energy distribution in the forbidden band. |
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