Stabilization of magnetic polarons in antiferromagnetic semiconductors by extended spin distortions

Details Stabilization of magnetic polarons in antiferromagnetic semiconductors by extended spin distortions Stabilization of magnetic polarons in antiferromagnetic semiconductors by extended spin distortions

2002-10-14

arxiv.org/abs/cond-mat/0210279v3

Eur. Phys. J. B 39 (2004) 447

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 1 figure, RevTex 4, submitted to PRB; v2: one reference added, minor changes in the experiment discussion; v3: minor

Scientific paper

10.1140/epjb/e2004-00216-8

We study the problem of a magnetic polaron in an antiferromagnetic semiconductor (ferron). We obtain an analytical solution for the distortion produced in the magnetic structure of the d-spins due to the presence of a charge carrier bound to an impurity. The region in which the charge carrier is trapped is of the order of the lattice constant (small ferron) but the distortion of the magnetic structure extends over much larger distance. It is shown that the presence of this distortion makes the ferron more stable, and introduces a new length scale in the problem.

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