Abstract
Temperature dependences of the magnetic susceptibility of p-type crystals of Bi2Te3-Sb2Te3 solid solutions containing from 25 to 70 mol percent antimony telluride were examined in the range from 2 to 400 K. A correlation was found between the features observed in the behavior of temperature dependences of the magnetic susceptibility of crystals containing 60 and 70 mol percent Sb2Te3 and the ratio of the plasmon energy to the energy of the gap between the chemical potential level and the heavy hole subband. An assumption is formulated that in the case of convergence of these energies, the increasing electron--plasmon interaction affects the electron system state and, consequently, the magnitude of magnetic susceptibility. Keywords: bismuth and antimony tellurides, magnetic susceptibility, plasmon, interband transitions, electron--plasmon interaction.
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