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Vacuum Ultraviolet Dielectric Function and Band Structure of ZnO
Rudiger Schmidt-Grund,Bernd Rheinlander,Evgeni M. Kaidashev,Michael Lorenz,Marius Grundmann,Daniel Fritsch,Mathias M. Schubert,Heidemarie Schmidt,Craig M. Herzinger 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.1
For ZnO, the optical dielectric functions for polarizations parallel and perpendicular to the optical axis were determined in the photon energy range from 4.0 to 9.5 eV by using generalized spectroscopic ellipsometry and the band structure was calculated by means of the empirical pseudopotential method. From the band structure, a theoretical dielectric function was derived. The dielectric functions reveal features that were identied as band-to-band transitions. The energies of those transitions were assigned to band-to-band transition energies of critical points of the calculated band structure. For ZnO, the optical dielectric functions for polarizations parallel and perpendicular to the optical axis were determined in the photon energy range from 4.0 to 9.5 eV by using generalized spectroscopic ellipsometry and the band structure was calculated by means of the empirical pseudopotential method. From the band structure, a theoretical dielectric function was derived. The dielectric functions reveal features that were identied as band-to-band transitions. The energies of those transitions were assigned to band-to-band transition energies of critical points of the calculated band structure.