This article is cited in 3 papers

Lattice dynamics

Specific features of the properties of Hg–Te lattice vibrations in Cd$_{1-y}$Hg$_y$Te alloys enriched with CdTe

S. P. Kozyrev

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: In alloys (solid solutions) Cd$_{1-y}$Hg$_y$Te enriched with CdTe, the properties of Hg–Te lattice vibrations are determined by a single-well lattice potential for the Hg atom located at the center of the anion tetrahedron. The HgTe-enriched alloys retain the anomalous properties of Hg–Te lattice vibrations, which are determined by a double-well lattice potential for the Hg atom located in the off-center position at low temperatures; a shallower well of the potential for the Hg atom located at the center of the anion tetrahedron is filled upon thermal activation. The polarizability of the ion pair in the TO mode of Hg–Te lattice vibrations with the Hg atom located at the center of the anion tetrahedron for the CdTe-enriched alloys considerably exceeds the polarizability of the pair with the off-center Hg atom for the HgTe-enriched alloys.

Received: 07.02.2012

 English version: Physics of the Solid State, 2012, 54:9, 1857–1863

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