A⁺ Center and A⁺ Related Complex in Zinc Doped Germanium

Abstract

Far-infrared photoconductivity measurement at 1.5 to 10 K confirms the existence of an A+ center and an A+ related complex in zinc doped germanium. Hole binding energies of the A+ center and the A+ related complex are estimated as about 2 and 7 meV, respectively, from the lower energy threshold of photoconductivity and the dependence of photoconductivity on temperature.