Electrical Conduction in Undoped CdS at Low Temperatures

概要

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The compensation dependences of the resistivity and Hall constant of CdS contain-ing 3X 10" cm ' donors have been studied at temperatures between 4 and 300 K.The compensation ratio was changed by thermal recovery of acceptor-type defectswhich were introduced into higln-purity samples by 10 MeV elecctron irradiation. Atvarious compensations, the temperature dependences of the resistivity and Hall con-slant show the features of impurity conduction. At low compeuusations the conduction similar to the D band conduction appears, although the ratio of the averagedistance of donors r to their effective Bohr radius a. is r./ a. $ 17. At high compensa-lions it is difficult to observe the low-temperature conduction. It is suggested that thelow-temperature conduction is the impurity conduction assisted by electron-phononinteraction via the piezoelectric field.
社団法人日本物理学会の論文
1985-11-15