Magneto-optical spectroscopy of (Ga,Mn)N epilayers

Abstract

We report on the magneto-optical spectroscopy and cathodoluminescence of a set of wurtzite (Ga,Mn)N epilayers with a low Mn content, grown by molecular beam epitaxy. The sharpness of the absorption lines associated to the Mn${}^{3+}$ internal transitions allows a precise study of its Zeeman effect in both Faraday and Voigt configurations. We obtain a good agreement if we assume a dynamical Jahn-Teller effect in the 3d${}^4$ configuration of Mn, and we determine the parameters of the effective Hamiltonians describing the ${}^{5}T\_2$ and ${}^{5}E$ levels, and those of the spin Hamiltonian in the ground spin multiplet, from which the magnetization of the isolated ion can be calculated. On layers grown on transparent substrates, transmission close to the band gap, and the associated magnetic circular dichroism, reveal the presence of the giant Zeeman effect resulting from exchange interactions between the Mn${}^{3+}$ ions and the carriers. The spin-hole interaction is found to be ferromagnetic.

References in corpus (10)

• Electronic structure and magnetism of Mn doped GaN
• Different origin of the ferromagnetic order in (Ga,Mn)As and (Ga,Mn)N
• Effect of the s,p-d exchange interaction on the excitons in (Zn,Co)O epilayers
• High TC ferromagnetism in diluted magnetic semiconducting GaN:Mn films
• High-energy spectroscopic study of the III-V nitride-based diluted magnetic semiconductor Ga${}_{1-x}$Mn${}_x$N
• Ferromagnetic (Ga,Mn)N epilayers versus antiferromagnetic GaMn${}_3$N clusters
• Electronic structure of the substitutional versus interstitial manganese in GaN
• Transport and Magnetism in p-type cubic (Ga,Mn)N
• P-type conductivity in cubic GaMnN layers grown by molecular beam epitaxy
• Optical properties of Mn4+ ions in GaN:Mn codoped with Mg acceptors

Cited by in corpus (8)

• Optical Properties of III-Mn-V Ferromagnetic Semiconductors
• Hole states in wide band-gap diluted magnetic semiconductors and oxides
• Manipulating Mn--Mg${}_k$ cation complexes to control the charge- and spin-state of Mn in GaN
• Fermi level and bands offsets determination in insulating (Ga,Mn)N/GaN structures
• Electronic structure and Jahn-Teller effect in GaN:Mn and ZnS:Cr
• Effects of s,p - d and s - p exchange interactions probed by exciton magnetospectroscopy in (Ga,Mn)N
• Excitonic giant Zeeman effect in GaN:Mn^3+
• Magneto-Optical Effects Enhancement in DMS Layers Utilizing 1-D Photonic Crystal