Abstract
The electrical and dielectric properties of illuminated Hgl2 were studied at room temperature under various a.c.-signal amplitudes in the frequency range 1 Hz to 10 kHz. Below 40 H, We real part of the dielectric constant, ɛ′,was found to vag slightly with voltege for low electric fields (E 103V cm−1), σ ∝ exp [C(E/ɛ′)1/2], whereC is e constant. Above 40 Hz, this variation was in good agreement with the behaviour of the bulk, resistance of the crystal. Such behaviour is discussed in the view of Richardnon-Schottky and Poole-Frenkel conduction mechanisms, which seem to be operative in Hgl2 at room temperature.
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