Effect of Impurities on Free-Hole Infrared Absorption in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-Type Germanium
The free-hole absorption in $p$-type germanium (gallium-doped) is studied as a function of concentration over the range from ${10}^{15}$ to ${10}^{20}$ acceptors/${\mathrm{cm}}^...