Drift Mobilities of Electrons and Holes in Thallous Bromide

Abstract

Drift mobilities of electrons and holes in TlBr have been measured below and above the Debye temperature of LO-phonons by a transit time technique. They are compared with finite temperature polaron mobility theories. Rather satisfactory agreement between the experiment and the theory is obtained in electron polarons. The temperature dependence of measured hole polaron mobillity is quite different from what is expected from the theory.