HAIT Journal of Science and Engineering A
Volume 5, Issues 1-2, pp. 184-188
© 2008 Holon Institute of Technology

 

Instability of the homogeneous state in dilute ferromagnetic semiconductors

Ikhiel Ya. Korenblit

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

 

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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