Carrier-Concentration and Magnetic-Field Effect on Mn 2+ Luminescence in Bulk Zn 1-x Mn x Te Crystals

Author： Khoi L.v. Kossut J. Gałazka R.R.

ISSN： 0896-1107

Source： Journal of Superconductivity: Incorporating Novel Magnetism, Vol.16, Iss.2, 2003-04, pp. : 427-429

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Abstract

Measurements of photoluminescence, reflectance, and Hall effect as functions of the phosphorus doping level, temperature, and magnetic field in p-Zn_1-xMn_xTe crystals are reported. The photoluminescence reveals two competing intra-Mn recombination channels. The first channel originates in the energy transfer from the photogenerated carriers to the internal Mn²⁺(3d⁵) states leading to the intra-Mn radiative recombination. The second one originates in the energy transfer from Mn ions to thermally activated carriers leading to intra-Mn nonradiative recombination. The Mn emission can be controlled either by changing the doping level with the phosphorus impurities or by varying the temperature and/or an external magnetic field.