Volume dependence of the dielectric properties of amorphous SiO2.
Volume dependence of the dielectric properties of amorphous SiO2.
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非晶 SiO2 介电性能的体积依赖性。
DOI:
10.1039/c5cp06775h
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
C. Persson
中科院分区:
文献类型:
--
作者:
O. Malyi;M. Boström;Vadym V Kulish;P. Thiyam;D. Parsons;C. Persson
Using first principles calculations, the analysis of the dielectric properties of amorphous SiO2 (am-SiO2) was performed. We found that the am-SiO2 properties are volume dependent, and the dependence is mainly induced by the variation of nanoporosity at the atomic scale. In particular, both ionic and electronic contributions to the static dielectric constants are functions of volume with clear trends. Moreover, using the unique parameterization of the dielectric function provided in this work, we predict dielectric functions at imaginary frequencies of different SiO2 polymorphs having similar band gap energies.