2016
DOI: 10.1016/j.ssc.2016.06.015
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A small shoulder of optical absorption in polycrystalline HfO2 by LDA+U approach

Abstract: The dielectric function of the wide-gap optical material HfO 2 is investigated by the local density approximation (LDA) +U approach. We focus on the origin of the shoulder-like structure near the edge of the band gap in the imaginary part of the dielectric function, which has been observed on the thin films of monoclinic HfO 2 . A comparison study on the three polymorphs of hafnia shows that regardless of the underlying crystal structure, the existence of the shoulder is directly controlled by the value of the… Show more

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