The complex plane impedance diagram of crystal rectifiers were usually analysed as a circle. The observed results on cuprous oxide rectifiers deviated considerably from a circle. To analyse the results, the writers used the series resistance,
Rs, of the bulk part of Cu
2O derived from static current-voltage characteristics. Then,
Z−
Rs=
Zl gave the impedance of blocking layer, and
Yl=1⁄
Zlr its admittance. Denoting, the zero frequency conductance by
Yl0, and putting
Yl−
Yl0=
G+
iω
C, dispersion of
G and
C was defined experimentally, at various biases and temperatures. A patch theory of the blocking layer proposed to explain the dispersion agrees with the observed results quantitatively.
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