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Title: Ultrasonic investigation of a phase transition in ZnSe:Ni
Authors: Gudkov, V. V.
Petrov, S. B.
Lonchakov, A. T.
Zhevstovskikh, I. V.
Sokolov, V. I.
Gruzdev, N. B.
Issue Date: 2004
Publisher: AIP Publishing
Abstract: Ultrasonic experiments on ZnSe and ZnSe:Ni crystals with impurity concentrations of 5.5×10 19 cm -3 have revealed precursor phenomena at temperatures much higher than the temperature of the structural transition (T c =14.5K). It is found that the elastic constant C 44 softens while C 11 and C 12 become stiffer as T c is approached from above; the strains associated with the order parameter are transverse deformations of the ε 4 type. A brief symmetry analysis of the possibilities of formation of a tetragonal phase is given. The Jahn-Teller effect and displacement of the charge density on the chemical bonds are discussed as probable causes of the low-temperature phase transition. © 2004 American Institute of Physics.
ISSN: 1063-777X
DOI: 10.1063/1.1820023
SCOPUS: 22544467481
WoS: 000225481500016
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS

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