Abstract
We have carried out first-principles total-energy calculations of bulk and (001) surfaces of PbZrO3. The ground state for bulk PbZrO3 is determined to be the antiferroelectric orthorhombic phase, with the ferroelectric rhombohedral and paraelectric cubic phases being 0.14 and 0.39 eV per formula unit higher in energy, respectively. PbO- and ZrO2-terminated (001) surfaces, either clean or when hydroxyl species were adsorbed were considered. Surface relaxations, in-plane antiferroelectric distortions and modifications to the electronic structure due to the surfaces, and hydroxyl adsorbates on the surfaces were investigated. We find that while clean surfaces retained bulk-like behavior, hydroxyl adsorbates induce significant changes to the surface geometry as well as introduce electronic states in the band gap possibly rendering the surfaces metallic.
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Acknowledgements
GP and RR would like to acknowledge financial support of this work by a grant from DARPA through a sub-contract from General Electric. Helpful discussions with Dr. Steve Boggs and Dr. Pamir Alpay are gratefully acknowledged.
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Pilania, G., Tan, D.Q., Cao, Y. et al. Ab initio study of antiferroelectric PbZrO3 (001) surfaces. J Mater Sci 44, 5249–5255 (2009). https://doi.org/10.1007/s10853-009-3465-0
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DOI: https://doi.org/10.1007/s10853-009-3465-0