高压下RhB的相变、弹性性质、电子结构及硬度的第一性原理计算

王金荣; 朱俊; 郝彦军; 姬广富; 向钢; 邹洋春

doi:10.7498/aps.63.186401

摘要

采用密度泛函理论中的赝势平面波方法系统地研究了高压下RhB的结构相变、弹性性质、电子结构和硬度. 分析表明，RhB在25.3 GPa时从anti-NiAs结构相变到FeB结构，这两种结构的弹性常数、体弹模量、剪切模量、杨氏模量和弹性各向异性因子的外压力效应明显. 电子态密度的计算结果显示，这两种结构是金属性的，且费米能级附近的峰随着压强的增大向两侧移动，赝能隙变宽，轨道杂化增强，共价性增强，非局域化更加明显. 此外，硬度计算结果显示，anti-NiAs-RhB的金属性比较弱，有着较高的硬度，属于硬质材料.

关键词:

Abstract

The structural phase transition, elastic, electronic properties and hardness for boride rhodium (RhB) under high pressure are systematically investigated by using the pseudopotential plane-wave density functional. The obtained lattice parameters, bulk modulus and elasitc constants are in good agreement with the available experimental and previous theoretical results at zero pressure. Furthermore, the mechanism of the high pressure structural phase transition is studied in detail. Our results show that RhB undergoes a structural phase transition from anti-NiAs-type to FeB-type at 25.3 GPa, which is in good agreement with other reported theoretical result. We also predict the pressure induced elastic constants, bulk modulus, shear modulus, Young's modulus, Poisson's coefficients, and elastic anisotropy factors, and find that the pressure has an important influence on the elastic properties. The calculated electronic density of states reveals that the pressure will strengthen the orbital hybridization between the Rh states and B states, the nonlocal effect and the strength of the covalent bond. Finally, on the basis of the Mulliken overlap populationanalysis, we obtain that the hardness of anti-NiAs-RhB is 18.1 GPa, which is compatible to the experimental value.

Keywords:

作者及机构信息

1.
四川大学物理与科学技术学院, 成都 610064;

2.
中国工程物理研究院流体物理研究所, 绵阳 621900

基金项目: 教育部新世纪人才支持计划（批准号：11-0351）和国家自然科学基金（批准号：11004141，11174212）资助的课题.

Authors and contacts

1.
College of Physical Science and Technology, Sichuan University, Chengdu 610064, China;

2.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China

Funds: Project supported by New Century Excellent Talents in University (NCET), China (Grant No. 11-0351), and the National Natural Science Foundation of China (Grant Nos. 11004141, 11174212).

参考文献

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施引文献

[1]	Gu Q, Krauss G, Steurer W 2008 Adv. Mater. 20 3620
[2]	Kaner R B, Gilman J J, Tolbert S H 2005 Science 308 1268
[3]	Cumberland R W, Weinberger M B, Gilman J J, Clark S M, Tolbert S H, Kaner R B 2005 J. Am. Chem. Soc. 127 7264
[4]	Solozhenko V L, Dub S N, Novikov N V 2001 Diam. Relat. Mater. 10 2228
[5]	Solozhenko V L, Kurakevych O O, Andrault D, Godec Y L, Mezouar M 2009 Phys. Rev. Lett. 102 015506
[6]	Chung H Y, Weinberger M B, Yang J M, Tolbert S H, Kaner R B 2008 Appl. Phys. Lett. 92 261904
[7]	Gou H, Hou L, Zhang J, Li H, Sun G, Gao F 2006 Appl. Phys. Lett. 88 221904
[8]	Hebbache M, Stuparević L, Živković D A 2006 Solid. State. Commun. 139 227
[9]	Chiodo S, Gotsis H J, Russo N, Sicilia E 2006 Chem. Phys. Lett. 425 311
[10]	Zhao W J, Wang Y X 2009 J. Solid. State.Chem. 182 2880
[11]	Li J J, Zhao X P, Tao Q, Huang X Q, Zhu P W, Cui T, Wang X 2013 Acta Phys. Sin. 62 026202(in Chinese)[黎军军, 赵学坪, 陶强, 黄晓庆, 朱品文, 崔田, 王欣 2013 62 026202]
[12]	Aronsson B, Åselius J, Stenberg E 1959 Nature 183 1318
[13]	Rau J V, Latini A 2009 Chem. Mater. 21 1407
[14]	Latini A, Rau J V, Teghil R, Generosi A, Albertini V R 2010 ACS Appl. Mater. Inter. 2 581
[15]	Wang Q, Zhao Z, Xu L, Wang L M, Yu D, Tian Y, He J 2011 J. Phys. Chem. C 115 19910
[16]	Bouhemadoua A, Khenata R 2006 Phys. Lett. A 25 339
[17]	Louail L, Maouche D, Roumili A, Sahraoui F A 2004 Mater. Lett. 58 2975
[18]	Vanderbilt D 1990 Phys. Rev. B 41 7892
[19]	Perdew J P, Burke K, Ernzerhof M 1996 Phys. Rev. Lett. 77 3865
[20]	Payne M C, Teter M P, Allen D C, Arias T A, Joannopoulos J D 1992 Rev. Mod. Phys. 64 1045
[21]	Monkhorst H J, Pack J D 1976 Phys. Rev. B 13 5188
[22]	Pfrommer B G, Cote M, Louie S G, Cohen M L 1997 J. Comp. Physiol. 131 233
[23]	Wallace D C 1972 Thermodynamics of Crystals (New York: Wiley)
[24]	Wang J, Yip S, Phillpot S R, Wolf D 1995 Phys. Rev. B 52 12627
[25]	Barron T H K, Klein M L1965 Proc. Phys. Soc. 85 523
[26]	Reuss A, Angew Z 1929 Math. Mech. 9 55
[27]	Li W H 2012 J. Alloy. Compd. 537 216
[28]	Nye J F 1985 Physical Properties of Crystals (Oxford: Oxford University Press)
[29]	Hill R 1952 Proc. Soc. London. A 65 350
[30]	Nevitt M V, Chan S, Liu J Z, Grinsditch M H, Fang Y 1988 Physica B 150 230
[31]	Pugh S F 1954 Philos. Mag. 45 823
[32]	Frantsevich I N, Voronov F F, Bokuta S A 1983 Elastic Constants and Elastic Moduli of Metals and Insulators Handbook (Kiev: NaukovaDumka)
[33]	Wang J, Li C M, Ao J, Li F, Chen Z Q 2013 Acta Phys. Sin. 62 087102(in Chinese)[王瑨, 李春梅, 敖靖, 李凤, 陈志谦 2013 62 087102]
[34]	Steinle-Neumann G, Stixrude L, Cohen R E 1999 Phys. Rev. B 60 791
[35]	Yang Z J, Guo Y D, Linghu R F, Cheng X L, Yang X D 2012 Chin. Phys. B 21 056301
[36]	Ravindran P, Fast L, Korzhavyl P A, Johansson B, Wills J, Eriksson O 1998 J. Appl. Phys. 84 4891
[37]	Anderson O L 1963 J. Phys. Chem. Solids. 24 909
[38]	Westbrook J H, Conrad H 1973 The Science of Hardness Testing and Its Research Applications (Ohio: American Society for Metals)
[39]	Gao F M 2006 Phys. Rev. B 73 132104
[40]	Xu H B, Wang Y X 2009 Acta Phys. Sin. 58 5645(in Chinese)[许红斌, 王渊旭 2009 58 5645]
[41]	Wang Z H, Kuang X Y, Zhong M M, Peng L, Mao A J, Huang X F 2011 Europhys. Lett. 95 66005
[42]	Liu J, Kuang X Y, Wang Z H, Huang X F 2012 Chin. Phys. B 21 086103
[43]	Jin Y Y, Kuang X Y, Wang Z H, Huang X F 2013 High. Pressure Res. 33 153
[44]	Pu C Y, Zhou D W, Bao D X, Lu C, Jin X L, Su T C, Zhang F W 2014 Chin. Phys. B 23 026201
[45]	Gao F M, He J L, Wu E D, Liu S M, Yu D L, Li D C, Zhang S Y, Tian Y J 2003 Phys. Rev. Lett. 91 015502
[46]	Gou H, Hou L, Zhang J, Gao F 2008 Appl. Phys. Lett. 92 241901

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