Screened-exchange determination of the electronic properties of monoclinic, tetragonal, and cubic zirconia

J. E. Medvedeva, Arthur J Freeman, C. B. Geller, D. M. Rishel

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

First-principles electronic band structure investigations of monoclinic, tetragonal, and cubic Zr O2 reveal the highly anisotropic nature of the conduction and valence band topologies in the monoclinic phase with electron and hole effective masses differing by over an order of magnitude in perpendicular directions. The planes of relatively high implied electron and hole mobilities intersect along a single crystallographic direction, making this the only direction readily available for exciton motion. Conversely, in the tetragonal and cubic phases, charge carrier effective masses are more isotropic and exciton motion is less restricted. These findings may explain recent experimental observations suggesting that exciton production via gamma irradiation in zirconia crystallites immersed in water is responsible for the accelerated dissociation of adsorbed water molecules on crystallite surfaces, and for the specificity of the effect to the tetragonal zirconia phase.

Original languageEnglish
Article number235115
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number23
DOIs
Publication statusPublished - Dec 13 2007

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zirconium oxides
Excitons
Zirconia
Electronic properties
excitons
electronics
Hole mobility
Water
Electron mobility
hole mobility
Valence bands
Conduction bands
Charge carriers
electron mobility
Crystallites
Band structure
water
crystallites
charge carriers
conduction bands

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Screened-exchange determination of the electronic properties of monoclinic, tetragonal, and cubic zirconia. / Medvedeva, J. E.; Freeman, Arthur J; Geller, C. B.; Rishel, D. M.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 23, 235115, 13.12.2007.

Research output: Contribution to journalArticle

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