Computational Materials Science, ( ISI ), Volume (31), No (4), Year (2004-6) , Pages (125-130)

Title : ( First-principles study of structural, dynamical, and dielectric properties of A-La2O3 )

Authors: razieh valiasill , Mohammad Hosseini ,

Citation: BibTeX | EndNote

Abstract

Abstract We have investigated the structural, dynamical, and dielectric properties of A-La2O3, within density-functional theory. The relaxed structural parameters are found to be in very good agreement with experimental data. Density functional perturbation theory was used to calculate the zone-center phonon frequencies, Born effective charge tensors, and the dielectric permittivity tensors. The static permittivity constant is decomposed to its electronic component and the individual contribution of IR-active modes. It is found, for both the direction parallel to the trigonal axis and the direction perpendicular to it, that the ionic contribution to the static dielectric permittivity is mostly due to a single IR active mode.

Keywords

, PACS: 77.22.)d; 63.20.)e; 61.66.)f Keywords: A, La2O3; Density, functional theory; Dielectric permittivity tensors; Gate, dielectric
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1015269,
author = {Valiasill, Razieh and Hosseini, Mohammad},
title = {First-principles study of structural, dynamical, and dielectric properties of A-La2O3},
journal = {Computational Materials Science},
year = {2004},
volume = {31},
number = {4},
month = {June},
issn = {0927-0256},
pages = {125--130},
numpages = {5},
keywords = {PACS: 77.22.)d; 63.20.)e; 61.66.)f Keywords: A-La2O3; Density-functional theory; Dielectric permittivity tensors; Gate-dielectric},
}

[Download]

%0 Journal Article
%T First-principles study of structural, dynamical, and dielectric properties of A-La2O3
%A Valiasill, Razieh
%A Hosseini, Mohammad
%J Computational Materials Science
%@ 0927-0256
%D 2004

[Download]