Issue 8, 2018

Topologically protected hybrid states in graphene–stanene–graphene heterojunctions

Abstract

A gapless conducting boundary state is one of the salient features of time-reversal-invariant topological insulators (TIs), which have attracted a lot of interest due to their fundamental importance and practical applications. Achieving robust non-trivial edge channels at the solid-state interface is a crucial step towards functional junction-based modern electronic devices. Here, we report a van der Waals heterostructure based graphene–stanene–graphene (C–Sn–C) quantum wall (QW), which shows a topologically protected hybrid state at the graphene–stanene interface. The inverted band ordering and metallic edge states confirm the non-trivial band topology with a non-trivial band gap of 0.15 eV, which is considerably higher than that of stanene. We find that the hybrid state in the QW provides topological protection in graphene. The high carrier mobility of graphene and the QSH state of stanene may coexist in the C–Sn–C system and that could pave the way to novel spin-based electronic devices.

Graphical abstract: Topologically protected hybrid states in graphene–stanene–graphene heterojunctions

Supplementary files

Article information

Article type
Communication
Submitted
15 নবে 2017
Accepted
24 জানু 2018
First published
24 জানু 2018

J. Mater. Chem. C, 2018,6, 1920-1925

Topologically protected hybrid states in graphene–stanene–graphene heterojunctions

C. Mondal, S. Kumar and B. Pathak, J. Mater. Chem. C, 2018, 6, 1920 DOI: 10.1039/C7TC05212J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements