Functional Mn--Mg${}_k$ cation complexes in GaN featured by Raman spectroscopy

Abstract

The evolution of the optical branch in the Raman spectra of (Ga,Mn)N:Mg epitaxial layers as a function of the Mn and Mg concentrations, reveals the interplay between the two dopants. We demonstrate that the various Mn-Mg-induced vibrational modes can be understood in the picture of functional Mn--Mg${}_k$ complexes formed when substitutional Mn cations are bound to $k$ substitutional Mg through nitrogen atoms, the number of ligands $k$ being driven by the ratio between the Mg and the Mn concentrations.

Accepted for publication in Applied Physics Letter

References in corpus (2)

• Ferromagnetism in semiconductors and oxides: prospects from a ten years' perspective
• Manipulating Mn--Mg${}_k$ cation complexes to control the charge- and spin-state of Mn in GaN

Cited by in corpus (3)

• All-nitride and In-free Al${}_x$Ga${}_{1-x}$N:Mn/GaN distributed Bragg reflectors for the near-infrared
• Raman scattering studies of the lateral Mn distribution in MBE-grown Ga1-xMnxN epilayers
• Resonant excitation of infra-red emission in GaN:(Mn,Mg)