Ab-initio studies of the electronic and optical properties of ZnWO₄ and CdWO₄ single crystals

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• 作者：M.G. Brik ; ^{brik@fi.tartu.ee} ; V. Nagirnyi ; M. Kirm
• 关键词：Electronic materials ; Ab initio calculations ; Crystal structure ; Electronic structure
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 出版时间：15 June, 2012
• 年：2012
• 卷：134
• 期：2-3
• 页码：1113-1120
• 全文大小：1114 K

文摘

Two technologically important materials - cadmium tungstate CdWO₄ and zinc tungstate ZnWO₄ - are studied in details using the plane wave based first-principles calculations. The optimized crystal structures were used to calculate the electronic and optical properties of both materials. Comparison of the calculated results with the available in the literature experimental X-ray photoelectron spectra (XPS) and reflectivity spectra yielded good agreement and allowed for assignment of the experimentally observed features, including those induced by difference between the Cd 4d and Zn 3d states. In addition, the variations in the electron density distributions related to two crystallographically in equivalent oxygen positions were revealed.