PACS:72.20.Pa, 72.20.My, 72.40.+w, 72.80.Ey (all) DOI:10.1070/PU1972v014n06ABEH004791 URL: https://ufn.ru/en/articles/1972/6/q/ Citation: Agaev Ya A "Research in the Field of Semiconductor Physics at the Physico-technical Institute of the Turkmenian Academy of Sciences" Sov. Phys. Usp.14 797–798 (1972)