Electrical and Optical Properties of Intermetallic Compounds. II. Gallium Antimonide

The Hall effect and resistivity of GaSb have been investigated over the temperature range 78° to 750°K. Hole mobilities as high as 400 ${\mathrm{cm}}^2$/volt-sec and a forbidden energy gap of 0.775 ev at absolute zero were found. Optical absorption studies at temperatures between 10° 300°K confirm this value of the band separation.