Infrared conductivity of metallic (III,Mn)V ferromagnets

Details Infrared conductivity of metallic (III,Mn)V ferromagnets Infrared conductivity of metallic (III,Mn)V ferromagnets

2002-04-09

arxiv.org/abs/cond-mat/0204209v2

Phys. Rev. B 66, R041202 (2002).

Physics

Condensed Matter

Materials Science

5 pages, 3 figures. Model parameters in figures of previous version did not match caption. Web-page link corrected

Scientific paper

10.1103/PhysRevB.66.041202

We present a theory of the infrared conductivity and absorption coefficients of metallic (III,Mn)V ferromagnetic semiconductors. We find that the conductivity is dominated by inter-valence-band transitions that produce peaks at $\hbar \omega \sim 220 {\rm meV}$ and obscure the broadened Drude peak. We demonstrate that transverse f-sum rule measurements can be used to extract accurate values for the free carrier density, bypassing the severe characterization difficulties that have till now been created by the large anomalous Hall effect in these materials.

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