Electronic and optical properties of MgxZn1-xO and CdxZn1-xO from ab initio calculations

André Schleife, Claudia Rödl, Jürgen Furthmüller, Friedhelm Bechstedt

Research output: Contribution to journalArticlepeer-review


Isostructural and heterostructural pseudobinary MgxZn 1-xO and CdxZn1-xO alloys are studied by combining the wurtzite and the rocksalt polymorphs within a cluster expansion. The computationally demanding calculation of the quasiparticle electronic structure has been achieved for all cluster cells of the expansion using the recently developed HSE03 + G0W0scheme. These results are used to compute the configurational averages for the fundamental band gaps and the densities of states. A strongly nonlinear behavior of the band gaps is observed and it is quantified by means of the corresponding bowing parameters for both material systems. In order to calculate the macroscopic dielectric functions, including excitonic and local-field effects for iso- and heterostructural MgxZn1-xO alloys as well as wurtzite (wz) CdxZn1-xO, the Bethe-Salpeter equation has been solved for each of the corresponding clusters. The respective configurational averages indicate that the composition-dependent variation in the exciton peaks allows conclusions on the alloy composition and preparation conditions.

Original languageEnglish (US)
Article number085012
JournalNew Journal of Physics
StatePublished - Aug 2011
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'Electronic and optical properties of MgxZn1-xO and CdxZn1-xO from ab initio calculations'. Together they form a unique fingerprint.

Cite this