Article ID Journal Published Year Pages File Type
1495706 Optical Materials 2012 5 Pages PDF
Abstract

Using the first-principles method based on the density functional theory, we have studied magnetic and optical properties of V-doped GaN. For 12.5% V-doped GaN, total energy calculations show that the ferromagnetic state is 255 meV lower than the antiferromagnetic state and is thus predicted to be the ground state with a Curie temperature above room temperature. The magnetic moments are localized at the V atoms and ferromagnetic exchange interaction is short ranged. The analysis of optical properties shows that V-doped GaN is a promising dielectric material and has potential applications in optoelectronic devices.

► V-doped GaN favors ferromagnetic ground state. ► Ferromagnetism originates from double exchange mechanism. ► Ferromagnetic exchange interaction is short ranged. ► New peaks appear in adsorption spectra for V-doped GaN. ► Refractive index increases in the low energy range after V doping.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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