NDLI: Prediction of a large-gap quantum-spin-Hall insulator: Diamond-like GaBi bilayer

Content Provider	Springer Nature Link
Author	Wang, Aizhu Du, Aijun Zhao, Mingwen
Copyright Year	2015
Abstract	A quantum-spin-Hall (QSH) state was achieved experimentally, albeit at a low critical temperature because of the narrow band gap of the bulk material. Twodimensional topological insulators are critically important for realizing novel topological applications. Using density functional theory (DFT), we demonstrated that hydrogenated GaBi bilayers (HGaBi) form a stable topological insulator with a large nontrivial band gap of 0.320 eV, based on the state-of-the-art hybrid functional method, which is implementable for achieving QSH states at room temperature. The nontrivial topological property of the HGaBi lattice can also be confirmed from the appearance of gapless edge states in the nanoribbon structure. Our results provide a versatile platform for hosting nontrivial topological states usable for important nanoelectronic device applications.
Starting Page	3823
Ending Page	3829
Page Count	7
File Format	PDF
ISSN	19980124
Journal	Nano Research
Volume Number	8
Issue Number	12
e-ISSN	19980000
Language	English
Publisher	Tsinghua University Press
Publisher Date	2015-09-16
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	topological insulators first-principles calculations two-dimensional cubic-diamond-like lattice Rashba spin splitting band inversion Nanotechnology Materials Science Atomic/Molecular Structure and Spectra Condensed Matter Physics Biotechnology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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