The Elastic Anisotropic and Thermodynamic Properties of I4mm-B3C

被引：13

作者：

Fan, Qingyang ^{[1
]}

Wei, Qun ^{[2
]}

Chai, Changchun ^{[1
]}

Yang, Yintang ^{[1
]}

Yu, Xinhai ^{[1
]}

Liu, Yang ^{[1
]}

Zheng, Junping ^{[1
]}

Zhou, Peikun ^{[3
]}

Zhang, Dongyun ^{[4
]}

机构：

[1] Xidian Univ, State Key Discipline Lab Wide BandGap Semicond Te, Sch Microelect, Xian 710071, Peoples R China

[2] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Peoples R China

[3] Univ Paris 11, Fac Sci, F-91400 Paris, France

[4] Natl Supercomp Ctr Shenzhen, Shenzhen 518055, Peoples R China

来源：

ACTA PHYSICA POLONICA A | 2016年 / 129卷 / 01期

关键词：

TRANSITION; SUPERHARD; SOLIDS; PHASE; BORON;

D O I：

10.12693/APhysPolA.129.103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The structural, elastic anisotropy and thermodynamic properties of the I4mm-B3C are investigated using first-principles calculations and the quasi-harmonic Debye model. The calculated elastic anisotropic suggest that I4mm-B3C is elastically anisotropic with its Poisson ratio, shear modulus, the Young modulus, the universal anisotropic index, shear anisotropic factors, and the percentage of elastic anisotropy for bulk modulus and shear modulus. The quasi-harmonic Debye model, using a set of total energy versus molar volume obtained with the first-principles calculations, is applied to the study of the thermal and vibrational effects. The thermal expansions, heat capacities, the Grneisen parameters and the Debye temperatures dependence on the temperature and pressure are obtained in the whole pressure range from 0 to 90 GPa and temperature range from 0 to 2000 K.

引用

页码：103 / 108

页数：6

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