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Measurements of resistivity, Hall coefficient, and optical absorption of AlSb are reported. The width of the forbidden energy band, derived from electrical and optical data, is 1. 6 ev at absolute zero. Absorption bands are observed at 0. 75 ev in p-type samples and at 0. 31 ev in tellurium-doped n-type specimens. An energy level diagram with several acceptor and donor levels in the forbidden energy band is suggested to explain these observations.
Blunt et al. (1954) studied this question.
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