Charge and magnetization inhomogeneities in diluted magnetic semiconductors |
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Authors: | Timm Carsten |
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Affiliation: | Institut für Theoretische Physik, Freie Universit?t Berlin, Arnimallee 14, D-14195 Berlin, Germany. |
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Abstract: | It is predicted that III-V diluted magnetic semiconductors can exhibit stripelike modulations of magnetization and carrier concentration. This inhomogeneity results from the strong dependence of the magnetization on the carrier concentration. Within Landau theory, a characteristic temperature T* below the Curie temperature is found so that below T* the equilibrium magnetization shows modulations, which are strongly anharmonic. The wavelength and amplitude of the modulation rise for decreasing temperature, starting from zero at T*. Above T*, the equilibrium state is homogeneous, but the coupling between charge and magnetization leads to the appearance of an electrically charged layer in domain walls. |
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