A simple rule for finding Dirac cones in bilayered perovskites

doi:10.1088/1674-1056/28/7/077106

CIOMP OpenIR

	A simple rule for finding Dirac cones in bilayered perovskites
	X.J.Chen; L.Liu; D.Z.Shen
	2019
发表期刊	Chinese Physics B
ISSN	1674-1056
卷号	28 期号:7 页码:4
摘要	A simple rule for finding Dirac cone electronic states in solids is proposed, which is neglecting those lattice atoms inert to particular electronic bands, and pursuing the two-dimensional (2D) graphene-like quasi-atom lattices with s-and pbindings by considering the equivalent atom groups in the unit cell as quasi-atoms. Taking CsPbBr3 and Cs3Bi2Br9 bilayers as examples, we prove the effectiveness and generality of this rule with the density functional theory (DFT) calculations. We demonstrate that both bilayers have Dirac cones around the Fermi level and reveal that their corresponding Fermi velocities can reach as high as similar to 0.2 x 10(6) m/s. This makes these new 2D layered materials very promising in making new ultra-fast ionic electronic devices.
关键词	Dirac cone,perovskites,graphene,density functional theory,total-energy calculations,graphene,insulator
DOI	10.1088/1674-1056/28/7/077106
URL	查看原文
收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63448
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X.J.Chen,L.Liu,D.Z.Shen. A simple rule for finding Dirac cones in bilayered perovskites[J]. Chinese Physics B,2019,28(7):4.
APA	X.J.Chen,L.Liu,&D.Z.Shen.(2019).A simple rule for finding Dirac cones in bilayered perovskites.Chinese Physics B,28(7),4.
MLA	X.J.Chen,et al."A simple rule for finding Dirac cones in bilayered perovskites".Chinese Physics B 28.7(2019):4.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
A simple rule for fi（2105KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载