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--Mgk 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.
@article{arxiv.1311.3097,
title = {Functional Mn--Mg$_k$ cation complexes in GaN featured by Raman spectroscopy},
author = {Thibaut Devillers and Douglas Marcel Gonçalves Leite and José Humberto Dias da Silva and Alberta Bonanni},
journal= {arXiv preprint arXiv:1311.3097},
year = {2014}
}
Comments
Accepted for publication in Applied Physics Letter