Fundamental optical absorption edge of undoped tetragonal zirconium dioxide

Aita, C. R.; Hoppe, E. E.; Sorbello, R. S.
February 2003
Applied Physics Letters;2/3/2003, Vol. 82 Issue 5, p677
Academic Journal
The high-frequency optical absorption edge of pure tetragonal ZrO[sub 2], isolated in a ZrO[sub 2]-Al[sub 2]O[sub 3] nanolaminate film structure, was determined using transmission spectrophotometry. The functional dependence of the absorption coefficient on photon energy shows two interband transitions: an initial indirect transition at 5.22 eV (i.e., the band gap) followed by a direct transition at 5.87 eV. The edge structure is associated with O2p → Zr4d electron states and discussed in terms of ab initio calculations reported in the literature.


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