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
E-mail: lonchakov@imp.uran.ru
pos Анотація:

Received September 7, 2006

Abstract

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;
PACS: 71.55.Gs II–VI semiconductors;
PACS: 65.40.Ba Heat capacity.

Key words: semiconductors, neutron scattering, heat capasity.

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