Low Temperature Physics: 33, 202 (2007); https://doi.org/10.1063/1.2719956 (5 pages)
Fizika Nizkikh Temperatur: Volume 33, Number 2-3 (February 2007), p. 276-281 ( to contents , go back )
The Jahn-Teller effect and shift deformation of lattice in Zn1-xMxSe solid solutions
V.I. Sokolov, A.T. Lonchakov, S.M. Podgornykh, S.F. Dubinin, S.G. Teploukhov, V.D. Parkhomenko, and N.B. Gruzdev
Institute of Metal Physics RAS, Ekaterinburg 620041, Russia
Received September 7, 2006
The structural state of wide-gap semiconductors Zn1–xNixSe (x = 0.0025) and Zn1–xCrxSe (x = 0.0029) was studied by the neutron diffraction method. Large-scale shear displacements of the ZnSe lattice atoms were detected. Such distortions are proposed to be induced by the Jahn—Teller ions Cr2+ and Ni2+. The experimental data on impurity heat capacity of solid solutions Zn1–xMxSe (M = Cr2+, Ni2+) in the temperature range 1.8–20 K are presented. The heat capacity method is described and applied to obtain inter-center transition energy in these systems. The Jahn—Teller effect role in the formation of 3d ions low-energy excited states is discussed.
PACS: 61.12.–q Neutron diffraction and scattering;
Key words: semiconductors, neutron scattering, heat capasity.