Lattice parameters, deviations from Vegards rule, and E-2 phonons in InAlN
2008 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 93, no 26, 261908- p.Article in journal (Refereed) Published
The lattice parameters of InxAl1-xN in the whole compositional range are studied using first-principle calculations. Deviations from Vegards rule are obtained via the bowing parameters, delta(a)=0.0412 +/- 0.0039 A and delta(c)=-0.060 +/- 0.010 A, which largely differ from previously reported values. Implications of the observed deviations from Vegards rule on the In content extracted from x-ray diffraction are discussed. We also combine these results with x-ray diffraction and Raman scattering studies on InxAl1-xN nanocolumns with 0.627 <= x <= 1 and determine the E-2 phonon frequencies versus In composition in the scarcely studied In-rich compositional range.
Place, publisher, year, edition, pages
2008. Vol. 93, no 26, 261908- p.
ab initio calculations, aluminium compounds, crystal structure, III-V semiconductors, indium compounds, nanostructured materials, phonon spectra, phonons, Raman spectra, X-ray diffraction
IdentifiersURN: urn:nbn:se:liu:diva-16526DOI: 10.1063/1.3056656OAI: oai:DiVA.org:liu-16526DiVA: diva2:158138