Abstract:
The dependence of the static permittivity of single-crystal germanium on hydrostatic pressure up to $P\approx$ 7.4 GPa is studied experimentally. As the pressure is increased to $P\approx$ 4 GPa, the permittivity of Ge decreases by a factor of $\sim$13 to $\varepsilon$ = 1.22. As the pressure is increased further to $P\approx$ 7 GPa, a moderate increase in $\varepsilon$ to the initial value is observed. In the range 7–7.4 GPa, the permittivity increases to a value larger than 1000. The experimental dependences obtained in the study substantially differ from the previously known dependences.
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