Optical properties of Mn4+ ions in GaN:Mn codoped with Mg acceptors

Abstract

The optical properties of Mn-Mg codoped epitaxial GaN were studied. Addition of Mg acceptors quenches the weak manganese-related photoluminescence (PL) band at 1.3 eV in GaN:Mn and a series of sharp PL peaks are observed at 1 eV in codoped epilayers. The change in PL spectra indicates that Mg addition stabilizes the Mn4+ charge state by decreasing the Fermi level. The 1 eV PL peaks are tentatively attributed to intra center transitions involving Mn4+ ions. Spin allowed 3d-shell 4T2-4T1 transitions and their phonon replicas are involved. The relative intensities of the sharp peaks are strongly dependent on the excitation wavelength, indicating the optically active Mn4+ centers involved in the separate peaks are different. The temperature dependence of the PL spectrum suggests the presence of at least three distinct Mn4+ complex centers.

arXiv comment14 pages, 3 figures, 1 table, accepted by Appl. Phys. Lett

References in corpus (1)

• Giant Magnetic Moments of Nitrogen Stabilized Mn Clusters and Their Relevance to Ferromagnetism in Mn Doped GaN

Cited by in corpus (6)

• Optical Properties of III-Mn-V Ferromagnetic Semiconductors
• Optical investigation of electronic states of Mn4+ ions in p-type GaN
• Optical Properties of Manganese Doped Wide Band Gap ZnS and ZnO
• Magneto-optical spectroscopy of (Ga,Mn)N epilayers
• Puzzling magneto-optical properties of ZnMnO films
• Resonant excitation of infra-red emission in GaN:(Mn,Mg)