Spectroscopy characterization of MnSe nanoclasters randomly distributed in HgMnTe single crystal

New semimagnetic semiconductor Hg0.91Mn0.09Te-MnSe mixture, grown by Bridgman method, was investigate by Atomic Force Microscopy, X-ray and far-infrared spectroscopy, in order to obtain the necessary feedback information to determine the optimal conditions for crystal growth. The investigated mixture consists of MnSe nanoclasters randomly distributed in Hg0.91Mn0.09Te matrix. Far-infrared reflectivity spectrum of the Hg0.91Mn0.09Te-MnSe mixture was measured in the 80–500 cm−1 range at a room temperature. The analysis of the far-infrared spectrum was made by the fitting procedure. The Maxwell-Garnett effective medium theory is used for modeling an effective dielectric function, and on that way calculating both electron and phonon response.

► New semimagnetic semiconductor Hg0.91Mn0.09Te monocrystal with MnSe nanoclusters.
► Nanoclusters of MnSe exist in α and β modificaions.
► Maxwell-Garnett effective medium theory modeling of effective dielectric function.
► The plasmon (ωp)—LO phonon interaction exists in whole mixture.
► Free carrier concentration is different in the matrix, α-MnSe and β-MnSe clusters.