This article is cited in 2 papers

Semiconductors

Temperature anomaly of the coefficient of ultrasonic absorption by electrons of hybridized states of cobalt impurities in mercury selenide

I. V. Zhevstovskikh^a, V. I. Okulov^a, V. V. Gudkov^b, V. Yu. Mayakin^b, M. N. Sarychev^b, M. D. Andriichuk^c, L. D. Paranchich<sup>c

a</sup> Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
^b Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg
^c Chernivtsi National University named after Yuriy Fedkovych

Abstract: The effects of the interaction of ultrasound with donor d electrons of cobalt impurity atoms at low concentrations in mercury selenide crystals have been investigated. The temperature dependences of the electronic contribution to the absorption coefficient at a frequency of 53 MHz in crystals with cobalt concentrations from 10$^{18}$ to 10$^{20}$ cm$^{-3}$ and in the undoped crystal have been observed experimentally. It has been found that crystals with impurities are characterized by an anomalous nonmonotonic temperature dependence of the absorption coefficient of the slow transverse wave in a narrow temperature range near 10 K. A smooth monotonic temperature dependence has been observed for longitudinal and fast transverse waves. Based on the developed theoretical interpretation, it has been established that the anomaly in the temperature dependence of the absorption coefficient of a slow transverse wave is associated with the hybridization of impurity d states in the conduction band of the crystal. A comparison of the theoretical and experimental dependences has made it possible to determine the parameters characterizing the hybridized electronic states.

Received: 25.08.2014

 English version: Physics of the Solid State, 2015, 57:5, 880–885

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