First-principles study on elastic and superconducting properties of Nb3Sn and Nb3Al under hydrostatic pressure

doi:10.1063/1.4935099

	First-principles study on elastic and superconducting properties of Nb3Sn and Nb3Al under hydrostatic pressure
	Zhang, R; Gao, PF; Wang, XZ; Zhou, YH; Wang, XZ (reprint author), Lanzhou Univ, Key Lab Mech Western Disaster & Environm, Key Lab Special Funct Mat & Struct Design, Minist Educ,Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China.
刊名	AIP Advances
	2015-10
卷号	5 期号:10
ISSN号	2158-3226
DOI	10.1063/1.4935099
文献子类	Article
英文摘要	The low temperature superconducting materials, such as Nb3Sn and Nb3Al, have similar crystal structures and elastic properties. However, their critical-temperature degradations always show the distinct way under mechanical stresses. In this study, first-principles calculations for the low temperature superconductors based on planewave pseudo-potential density functional theory within the generalized gradient approximation are implemented, and the elastic moduli of Nb3Sn and Nb3Al and those superconductivities in the presence of hydrostatic pressure are evaluated. The Debye temperatures are obtained by the bulk moduli and shear moduli of superconducting materials. The MacMillan equation is further used to acquire the critical temperatures of Nb3Sn and Nb3Al under different hydrostatic pressures. It is found that the elastic constants and bulk moduli of the low temperature superconductors are enhanced by the applied hydrostatic pressure, while the critical temperatures usually are decreased with the pressure. Additionally, the decrease of critical-temperature for Nb3Sn is more sensitive to the hydrostatic pressure than the one for Nb3Al. The prediction results show good agreement with the experimental results in the literatures qualitatively. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
学科主题	Science & Technology - Other Topics ; Materials Science ; Physics
出版地	MELVILLE
资助项目	国家自然科学基金项目 ; 国家磁约束核聚变能发展研究专项 ; 中央高校基本科研业务费专项资金
项目编号	Fund of Innovative Research Groups of the NNSFC [11421062] ; National Magnetic Confinement Fusion Energy Development Planning Project [2013GB110002B] ; Fundamental Research Funds for the Central Universities [lzujbky-2015-235]
语种	英语
WOS记录号	WOS:000364228800082
资助机构	NSFC ; MOST ; LZU
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/181360]
专题	土木工程与力学学院_期刊论文
通讯作者	Wang, XZ (reprint author), Lanzhou Univ, Key Lab Mech Western Disaster & Environm, Key Lab Special Funct Mat & Struct Design, Minist Educ,Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, R,Gao, PF,Wang, XZ,et al. First-principles study on elastic and superconducting properties of Nb3Sn and Nb3Al under hydrostatic pressure[J]. AIP Advances,2015,5(10).
APA	Zhang, R,Gao, PF,Wang, XZ,Zhou, YH,&Wang, XZ .(2015).First-principles study on elastic and superconducting properties of Nb3Sn and Nb3Al under hydrostatic pressure.AIP Advances,5(10).
MLA	Zhang, R,et al."First-principles study on elastic and superconducting properties of Nb3Sn and Nb3Al under hydrostatic pressure".AIP Advances 5.10(2015).