Abstract
In the transverse geometry we have detected birefringence that is linear in the magnetic field B and the light wave vector k in the cubic magnetic semiconductors Cd1−x MnxTe (0⩽x⩽0.52). The effect was found to be large, ∼1 (deg cm−1 T−1), and highly anisotropic, in contrast to the Faraday and Voigt effects. The phenomenon is represented by terms of type γ ijklBkkl in the permittivity tensor ε ij and can be described by two parameters, A and g. Spectral studies have shown that the normalized parameters A/x and g/x are independent of x, i.e., the effect can be related to the Mn2+ ions. Below the edge E g of the forbidden band, the dispersion of A is described by a (E g−E)−1.4-dependence, while the dispersion of g is nil. Theoretical analysis has shown that the spectral curves for A and g can be explained by the special features of the dispersion laws for electrons and holes (features related to the fact that there is no inversion center) and by the dependence of the parameters of the exchange interaction on the electron wave vector.
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Zh. Éksp. Teor. Fiz. 114, 1018–1033 (September 1998)
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Krichevtsov, B.B., Pisarev, R.V., Rzhevskii, A.A. et al. Magnetically induced spatial dispersion in the cubic magnetic semiconductors Cd1−x MnxTe. J. Exp. Theor. Phys. 87, 553–562 (1998). https://doi.org/10.1134/1.558693
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DOI: https://doi.org/10.1134/1.558693