Calculation of structural, elastic, electronic, and thermal properties of orthorhombic CaTiO3

被引：26

作者：

Boudali, A. ^{[1
]}

Abada, A. ^{[1
]}

Khodja, M. Driss ^{[1
]}

Amrani, B. ^{[2
]}

Amara, K. ^{[1
]}

Khodja, F. Driss ^{[1
]}

Elias, A. ^{[1
]}

机构：

[1] Univ Saida, Lab Etud Phys Chim, Saida 20000, Algeria

[2] Univ Mascara, Dept Phys, Mascara 29000, Algeria

来源：

PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 18期

关键词：

Orthorhombic CaTiO3; Perovskite; FP-LAPW; PW-PP; Thermal properties; POWDER NEUTRON-DIFFRACTION; PHASE-TRANSITIONS; PEROVSKITE CATIO3; OPTICAL-PROPERTIES; FIRST-PRINCIPLES; 1ST PRINCIPLES; HEAT-CAPACITY; SPACE GROUP; FERROELECTRICITY; 1ST-PRINCIPLES;

D O I：

10.1016/j.physb.2010.06.020

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Structural, elastic, and electronic properties of orthorhombic Pbnm CaTiO3 are studied using both full potential linearized augmented plane wave (FP-LAPW) and plane-wave pseudopotential (PW-PP) methods. Exchange-correlation effects are treated by the generalized gradient approximation (GGA). The equilibrium lattice constants, the bulk modulus, its pressure derivative, and the electronic structure are in good agreement with other calculations and with experimental data. For elastic constants, Young modulus, and Poisson ratio, to our knowledge, no data are available in literature for comparison. In addition, pressure and temperature effects on the volume cell, the bulk modulus, the heat capacity, and the thermal expansion coefficient are investigated in the 0-28 GPa pressure range and in the 0-1200 K temperature range. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3879 / 3884

页数：6

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