Lattice instability in ZnSe:Ni crystal

Lattice instability in ZnSe:Ni crystal

Ultrasonic experiments, done on ZnSe:Ni crystal with the dopant concentration 5.5 × 10^sup 19^ cm^sup -3^, revealed precursor phenomenon in the form of lattice softening at temperatures significantly exceeding the temperature of structural transition (T^sub c^ = 14.5 K). It proved to be that the ord...

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Veröffentlicht in:Journal of electronic materials 2004-07, Vol.33 (7), p.815-818
Hauptverfasser: Gudkov, V. V., Lonchakov, A. T., Tkach, A. V., Zhevstovskikh, I. V., Sokolov, V. I., Gruzdev, N. B.
Format: Artikel
Sprache:eng
Schlagworte:
Crystals
Nickel
Phase transitions
Semiconductors
Temperature
Zinc
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Zusammenfassung:Ultrasonic experiments, done on ZnSe:Ni crystal with the dopant concentration 5.5 × 10^sup 19^ cm^sup -3^, revealed precursor phenomenon in the form of lattice softening at temperatures significantly exceeding the temperature of structural transition (T^sub c^ = 14.5 K). It proved to be that the order parameter of the transition was associated with the shear deformation ε^sub 4^. Investigation of thermal conductivity (κ) in the same temperature region pointed out that the Jahn-Teller (JT) effect could be responsible for the anomalous behavior of κ(T) and lattice instability. [PUBLICATION ABSTRACT]
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-004-0247-y