Pressure induced phase transitions in transition metal nitrides: Ab initio study

被引：33

作者：

Srivastava, Anurag ^{[1
]}

Chauhan, Mamta ^{[1
]}

Singh, R. K. ^{[2
]}

机构：

[1] Indian Inst Informat Technol & Management, Adv Mat Res Lab, Gwalior 474010, India

[2] ITM Univ, Dept Phys, Gurgaon 122017, India

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2011年 / 248卷 / 12期

关键词：

bulk modulus; CsCl; density functional theory; high-pressure effects; nitrides; phase transitions; ELECTRONIC-PROPERTIES; COHESIVE PROPERTIES; ELASTIC-CONSTANTS; BAND-STRUCTURE; TOTAL-ENERGY; CARBIDES; 1ST-PRINCIPLES; SOLIDS; TIN; TAN;

D O I：

10.1002/pssb.201046589

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have analyzed the stability of transition metal nitrides (TMNs) XN (X?=?Ti, Zr, Hf, V, Nb, Ta) in their original rocksalt (B1) and hypothetical CsCl (B2) type phases under high compression. The ground state total energy calculation approach of the system has been used through the generalized gradient approximation (GGA) with the Perdew-Burke-Ernzerhof (PBE) type parameterization as exchange correlation functional. In the whole series of nitrides taken into consideration, tantalum nitride is found to be the most stable. We have observed that under compression the original B1-type phase of these nitrides transforms to a B2-type phase. We have also discussed the computation of ground state properties, like the lattice constant (a), bulk modulus (B0) and first order pressure derivative of the bulk modulus (B'0) of the TMNs and their host elements. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2793 / 2800

页数：8

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