Abstract
We have theoretically studied the emission-line width in Mn-composition modulated Cd1−xMnxTe quantum wires by using the multiband effective mass theory and fluctuation-dissipation theorem. The calculated emission-line width exhibits a broadening because of a statistical fluctuation in the magnetization of Mn spins in the exciton magnetic polaron. The line width is sensitive to both the temperature and the magnetic field in the Voigt configuration, which exhibits remarkable anisotropy depending on the external magnetic field direction. The anisotropic behavior is a typical feature of the one-dimensional system resulting from heavy-hole and light-hole mixing.
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