Issue 11, 2017

Theoretical design of a new family of two-dimensional topological insulators

Abstract

A new family of two-dimensional topological insulator, hydrogenated monolayer Pb2XY (X = Ga/In, Y = Sb/Bi), has been predicted using first-principles density functional theory. The electronic bulk band gap of the proposed systems can be induced in the presence of a spin–orbit coupling effect and its highest value (0.25 eV) was observed in the hydrogenated monolayer Pb2GaBi, which is suitable for practical application. Our simulation study points out that the nanoribbons derived from this new family harbor gapless edge channels. The non-trivial topological nature was further confirmed by calculating the Z2 topological invariant. These novel systems provide a new platform for topological phenomena observation and spintronic applications.

Graphical abstract: Theoretical design of a new family of two-dimensional topological insulators

Supplementary files

Article information

Article type
Communication
Submitted
20 Dec 2016
Accepted
20 Feb 2017
First published
20 Feb 2017

Phys. Chem. Chem. Phys., 2017,19, 7481-7485

Theoretical design of a new family of two-dimensional topological insulators

K. Chen, S. Lyu, Z. Luo, Y. Fu, Y. Heng and D. Mo, Phys. Chem. Chem. Phys., 2017, 19, 7481 DOI: 10.1039/C6CP08670E

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