Signatures of non-trivial band topology in LaAs/LaBi heterostructure

被引：6

作者：

Wadhwa, Payal ^{[1
]}

Kumar, T. J. Dhilip ^{[2
]}

Shukla, Alok ^{[3
]}

Kumar, Rakesh ^{[1
]}

机构：

[1] Indian Inst Technol Ropar, Dept Phys, TGraMS Lab, Rupnagar 140001, Punjab, India

[2] Indian Inst Technol Ropar, Dept Chem, Rupnagar 140001, Punjab, India

[3] Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2020年 / 32卷 / 39期

关键词：

topological materials; density functional theory; first-principles calculations; SIMPLE SCHEME; MAGNETORESISTANCE; BULK;

D O I：

10.1088/1361-648X/ab97e2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this article, we investigate non-trivial topological features in a heterostructure of extreme magnetoresistance (XMR) materials LaAs and LaBi using density functional theory. The proposed heterostructure is found to be dynamically stable and shows bulk band inversion with non-trivial Z(2)topological invariant and a Dirac cone at the surface. In addition, its electron and hole carrier densities ratio is also calculated to investigate the possibility to possess XMR effect. Electrons and holes in the heterostructure are found to be nearly compensated, thereby facilitating it to be a suitable candidate for XMR studies.

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页数：5

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