PHYSICAL-PROPERTIES OF GA2SE SINGLE-CRYSTALS

Measurements of the electrical conductivity, Hall effect, thermoelectr ic power were carried out in a wide temperature range (from about 170 to 475 K) for Ga2Se compound grown in single crystalline form. The pre sent investigation revealed unusual observations in the Hall effect an d the scattering mechanisms of the charge carriers indicating that Ga2 Se is not a simple semiconductor. Also it showed that Ga2Se has a rela tively high value of the thermoelectric power. A lot of physical param eters were deduced in the present study.