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
Infrared absorption in $p$-type germanium was investigated at various temperatures down to 5\ifmmode^\circ\else\textdegree\fi{}K. The absorption coefficient is proportional to t...