Infrared magneto-optical properties of (III,Mn)V ferromagetic semiconductors

Abstract

We present a theoretical study of the infrared magneto-optical properties of ferromagnetic (III,Mn)V semiconductors. Our analysis combines the kinetic exchange model for (III,Mn)V ferromagnetism with Kubo linear response theory and Born approximation estimates for the effect of disorder on the valence band quasiparticles. We predict a prominent feature in the ac-Hall conductivity at a frequency that varies over the range from 200 to 400 meV, depending on Mn and carrier densities, and is associated with transitions between heavy-hole and light-hole bands. In its zero frequency limit, our Hall conductivity reduces to the $\vec{k}$-space Berry's phase value predicted by a recent theory of the anomalous Hall effect that is able to account quantitatively for experiment. We compute theoretical estimates for magnetic circular dichroism, Faraday rotation, and Kerr effect parameters as a function of Mn concentration and free carrier density. The mid-infrared response feature is present in each of these magneto-optical effects.

arXiv comment11 pages, 5 figures

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Cited by in corpus (21)

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• Theory of ferromagnetic (III,Mn)V semiconductors
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• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Disorder effects in diluted magnetic semiconductors
• Spin-Hall and spin-diagonal conductivity in the presence of Rashba and Dresselhaus spin-orbit coupling
• Anisotropic Magnetoresistance and Magnetic Anisotropy in High-quality (Ga,Mn)As Films
• Magneto crystalline anisotropies in (Ga,Mn)As: A systematic theoretical study and comparison with experiment
• Kubo formula for Floquet states and photoconductivity oscillations in a 2D electron gas
• Magneto-transport and magneto-optical properties of ferromagnetic (III,Mn)V semicondcutors: a review
• Anomalous Hall Effect in Disordered Multiband Metals
• Tight-binding calculations of optical matrix elements for conductivity using non-orthogonal atomic orbitals: Anomalous Hall conductivity in bcc Fe
• Determination of the infrared complex magneto-conductivity tensor in itinerant ferromagnets from Faraday and Kerr measurements
• Electronic structure of ferromagnetic semiconductor Ga1-xMnxAs probed by sub-gap magneto-optical spectroscopy
• Optical properties of metallic (III,Mn)V ferromagnetic semiconductors in the infrared to visible range
• Infrared anomalous Hall effect in SrRuO${}_3$: Evidence for crossover to intrinsic behavior
• Theory of spin waves in diluted-magnetic-semiconductor quantum wells
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• Non linear transport theory for negative-differential resistance states of two dimensional electron systems in strong magnetic fields
• Voltage-controlled topological spin textures in the monolayer limit