Combined fast reversible liquidlike elastic deformation with topological phase transition in Na3Bi

IMR OpenIR

	Combined fast reversible liquidlike elastic deformation with topological phase transition in Na3Bi
	Cheng, Xiyue; Li, Ronghan; Li, Dianzhong; Li, Yiyi; Chen, Xing-Qiu; xingqiu.chen@imr.ac.cn
	2015
发表期刊	PHYSICAL REVIEW B
ISSN	1098-0121
卷号	92 期号:15 页码:-
摘要	By means of first-principles calculations, we identified the structural phase transition of Na3Bi from the hexagonal ground state to the cubic cF16 phase above 0.8 GPa, in agreement with the experimental findings. Upon the releasing of pressure, the cF16 phase of Na3Bi is mechanically stable at ambient condition. The calculations revealed that the cF 16 phase is topological semimetal (TS), similar to well-known HgTe, and it even exhibits an unusually low C' modulus (only about 1.9 GPa) and a huge anisotropy A(u) of as high as 11, which is the third-highest value among all known cubic crystals in their elastic behaviors. These facts render cF16-type Na3Bi very soft with a liquidlike elastic deformation in the (110) < 1 (1) over bar0 > slip system. Importantly, accompanying this deformation, Na3Bi shows a topological phase transition from a TS state at its strain-free cubic phase to a topological insulator (TI) at its distorted phase. Because the C' elastic deformation has almost no energy cost in a reversible and liquidlike soft manner, cF16-type Na3Bi would potentially provide a fast on/off switching method between TS and TI, which would be beneficial to quantum electronic devices for practical applications.
部门归属	[cheng, xiyue ; li, ronghan ; li, dianzhong ; li, yiyi ; chen, xing-qiu] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china
资助者	Hundred Talents Project of the Chinese Academy of Sciences; Key Research Program of Chinese Academy of Sciences [KGZD-EW-T06]; National Natural Science Foundation of China [51074151]
收录类别	sci
语种	英语
WOS记录号	WOS:000362428700002
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74670
专题	中国科学院金属研究所
通讯作者	xingqiu.chen@imr.ac.cn
推荐引用方式 GB/T 7714	Cheng, Xiyue,Li, Ronghan,Li, Dianzhong,et al. Combined fast reversible liquidlike elastic deformation with topological phase transition in Na3Bi[J]. PHYSICAL REVIEW B,2015,92(15):-.
APA	Cheng, Xiyue,Li, Ronghan,Li, Dianzhong,Li, Yiyi,Chen, Xing-Qiu,&xingqiu.chen@imr.ac.cn.(2015).Combined fast reversible liquidlike elastic deformation with topological phase transition in Na3Bi.PHYSICAL REVIEW B,92(15),-.
MLA	Cheng, Xiyue,et al."Combined fast reversible liquidlike elastic deformation with topological phase transition in Na3Bi".PHYSICAL REVIEW B 92.15(2015):-.