Relaxation Attenuation of Ultrasound by the Jahn-Teller Centers in ZnSe:Cr in High Magnetic Fields

N.S. Averkiev; I.B. Bersuker; V.V. Gudkov; S. Zherlitsyn; S. Yasin; I.V. Zhevstovskikh; K.A. Baryshnikov; A.M. Monakhov; M.N. Sarychev; Yu.V. Korostelin; A.I. Landman

doi:10.4028/www.scientific.net/SSP.233-234.125

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HomeSolid State PhenomenaSolid State Phenomena Vols. 233-234Relaxation Attenuation of Ultrasound by the...

Relaxation Attenuation of Ultrasound by the Jahn-Teller Centers in ZnSe:Cr in High Magnetic Fields

Abstract:

The magnetic field dependence of ultrasonic attenuation α (B) of slow shear waves in the ZnSe:Cr²⁺ crystal at a number of fixed temperatures from T=1.4 K to 20 K in magnetic fields of up to B=14 T were investigated. For magnetic fields B above 5 T we found that the attenuation increases with B monotonically, and at a given temperature it is proportional to the magnitude of relaxation attenuation at B=0. We show that the magnetic field dependent attenuation is due to the change in populations of the lowest energy levels of the impurity centers Cr_Zn4Se, produced by the Jahn-Teller effect and split by the spin-orbital interaction and the magnetic field. The calculations carried out without fitting parameters are in good agreement with the experimental data.

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Solid State Phenomena (Volumes 233-234)

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125-128

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.233-234.125

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Online since:

July 2015

Authors:

N.S. Averkiev, I.B. Bersuker, V.V. Gudkov, S. Zherlitsyn, S. Yasin, I.V. Zhevstovskikh*, K.A. Baryshnikov, A.M. Monakhov, M.N. Sarychev, Yu.V. Korostelin, A.I. Landman

Keywords:

Jahn-Teller Effect, Spin-Orbit Hamiltonian, Transition Metal Impurity, Ultrasound Attenuation, Zinc-Blende Structure

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