Determination of Exciton Zeeman Splittings in Cd1-xMnxTe from Faraday Rotation Measurements
A. Stachow, Nguyen The Khoi and J.A. Gaj
Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland
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Reflectivity and Faraday rotation measurements were carried out on Cd1-xMnxTe bulk crystals in the complete zinc-blende range of composition 0 < x ≤ 0.71. From a comparison of the results of these two experiments for samples with x ≤ 0.3, we demonstrate that the Faraday angle ϴ, measured in limited spectral range, is proportional to the energy splitting of exciton states ΔE, measured at the same temperature (2 K) and magnetic field B (up to 5 T). The determined proportionality constant was used to calculate ΔE values also for x > 0.3. This allowed us to find an empirical description of ΔE values for the whole range of compositions as a function of B and x.
DOI: 10.12693/APhysPolA.88.909
PACS numbers: 78.20.Ls, 71.35.+z