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HAIT Journal of Science and Engineering A Volume 5, Issues 1-2, pp. 184-188 © 2008 Holon Institute of Technology |
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Instability of the homogeneous state in dilute ferromagnetic semiconductorsIkhiel Ya. Korenblit |
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School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel e-mail: korn@post.tau.ac.il Received 10 June 2007 |
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We consider the stability of the homogeneous magnetically ordered state in dilute ferromagnetic semiconductors, with Ruderman-Kittel-Kasuya-Yosida indirect exchange. It is shown that when the electron (hole) polarization exceeds some critical value, the maximum of the indirect exchange shifts to a nonzero wave-vector promoting a state with charge and spin modulation. The modulated state becomes stable, when the carriers are almost fully polarized. PACS: 75.50.Pp, 71.55.Ak, 75.30.Kz |
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