Optical properties of metallic (III,Mn)V ferromagnetic semiconductors in the infrared to visible range

Abstract

We report on a study of the ac conductivity and magneto-optical properties of metallic ferromagnetic (III,Mn)V semiconductors in the infrared to visible spectrum. Our analysis is based on the successful kinetic exchange model for (III,Mn)V ferromagnetic semiconductors. We perform the calculations within the Kubo formalism and treat the disorder effects pertubatively within the Born approximation, valid for the metallic regime. We consider an eight-band Kohn-Luttinger model (six valence bands plus two conduction bands) as well as a ten-band model with additional dispersionless bands simulating phenomenologically the upper-mid-gap states induced by antisite and interstitial impurities. These models qualitatively account for optical-absorption experiments and predict new features in the mid-infrared Kerr angle and magnetic-circular-dichroism properties as a function of Mn concentration and free carrier density.

arXiv comment10 pages, 7 figures, some typos corrected

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Cited by in corpus (20)

• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Origin and control of ferromagnetism in dilute magnetic semiconductors and oxides
• Origin of the anomalous magnetic circular dichroism spectral shape in ferromagnetic (Ga,Mn)As: Impurity bands inside the band gap
• Interplay between carrier localization and magnetism in diluted magnetic and ferromagnetic semiconductors
• Ultrafast demagnetization in the sp-d model: a theoretical study
• Evolution of ferromagnetic circular dichroism coincident with magnetization and anomalous Hall effect in Co-doped rutile TiO2
• Systematic study of magnetic linear dichroism and birefringence in (Ga,Mn)As
• Determination of the infrared complex magneto-conductivity tensor in itinerant ferromagnets from Faraday and Kerr measurements
• Magneto-optical properties of (Ga,Mn)As: an ab--initio determination
• Electronic structure of ferromagnetic semiconductor Ga1-xMnxAs probed by sub-gap magneto-optical spectroscopy
• Spin-transfer physics and the model of ferromagnetism in (Ga,Mn)As
• Magneto-optics in pure and defective Ga_{1-x}Mn_xAs from first-principles
• Role of relaxation in spin Hall effect
• Disorder, spin-orbit, and interaction effects in dilute ${\mathrm{Ga}}_{1-x}{\mathrm{Mn}}_x\mathrm{As}$
• Resonant Faraday and Kerr effects due to in-gap states on the surface of a topological insulator
• Response properties of III-V dilute magnetic semiconductors: interplay of disorder, dynamical electron-electron interactions and band-structure effects
• $Ab$-$initio$ electronic structure, optical and magneto-optical properties of $MnGaAs$ digital ferromagnetic heterostructures
• Magnetic circular dichroism in GaMnAs: (no) evidence for an impurity band
• Orbital magnetization in dilute ferromagnetic semiconductors
• Temperature-dependent resistivity of ferromagnetic GaMnAs: Interplay between impurity scattering and many-body effects