Abstract
Ultrasonic experiments, done on ZnSe:Ni crystal with the dopant concentration 5.5×1019 cm−3, revealed precursor phenomenon in the form of lattice softening at temperatures significantly exceeding the temperature of structural transition (Tc=14.5 K). It proved to be that the order parameter of the transition was associated with the shear deformation ε4. 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.
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Gudkov, V.V., Lonchakov, A.T., Tkach, A.V. et al. Lattice instability in ZnSe:Ni crystal. J. Electron. Mater. 33, 815–818 (2004). https://doi.org/10.1007/s11664-004-0247-y
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DOI: https://doi.org/10.1007/s11664-004-0247-y