Abstract
Sb 2 Te 3− x Se x ( x = 0.00−1.25) single crystals were prepared using a modified Bridgman technique. The homogeneity of the crystals grown in this way was checked by means of an energy dispersion analyser and by reflectivity measurements. X-ray structure analysis revealed that the lattice parameters a and c decrease with increasing selenium content in the crystals. The crystals were characterized by measuring the infrared reflectivity spectra, electric conductivity and Hall constant. Experimental results showed that the incorporation of Se atoms into the crystal lattice of Sb 2Te 3 results in a suppression of the concentration of free carriers (holes).
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