Energy spectrum of charge carriers in TlIn1–xYbxTe2 solid solutions

The temperature dependences of the electrical conductivity σ(T), the Hall coefficient R(T), and the thermoelectric coefficient α(T) are investigated in TlIn1–xYbxTe2 (0 < x < 0.10) solid solutions at 80–1000К. From the kinetic parameters, the effective masses of electrons and holes are determined. The obtained experimental data on σ(T) and α(T) are interpreted within the context of a model with one and two types of charge carriers. It is established that, since x = 0.05, the TlIn1–xYbxTe2 solid solutions belong to the class of narrow-gap semiconductors that have high matrix elements of interaction.