Growth of n-type heteroepitaxial films of gray tin on (001) CdTe by molecular beam epitaxy

Abstract
We report the molecular beam epitaxy growth of α-Sn films on argon sputter cleaned (001) CdTe substrates on which a buffer layer of CdTe has been deposited. Films thinner than 400 Å are p-type with carrier densities as high as 2×1019 cm−3 ;thicker films are n-type with carrier densities of (4–10)×1017 . The best film had a mobility of 1.3×104 cm2 /V s at 77 K.