| Title: |
Prediction of a large-gap and switchable Kane-Mele quantum spin Hall insulator |
| Authors: |
Marrazzo, Antimo, Gibertini, Marco, Campi, Davide, Mounet, Nicolas, Marzari, Nicola |
| Source: |
Phys. Rev. Lett. 120, 117701 (2018) |
| Publication Year: |
2017 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics |
| More Details: |
Fundamental research and technological applications of topological insulators are hindered by the rarity of materials exhibiting a robust topologically non-trivial phase, especially in two dimensions. Here, by means of extensive first-principles calculations, we propose a novel quantum spin Hall insulator with a sizeable band gap of $\sim$0.5 eV that is a monolayer of Jacutingaite, a naturally occurring layered mineral first discovered in 2008 in Brazil and recently synthesised. This system realises the paradigmatic Kane-Mele model for quantum spin Hall insulators in a potentially exfoliable two-dimensional monolayer, with helical edge states that are robust and that can be manipulated exploiting a unique strong interplay between spin-orbit coupling, crystal-symmetry breaking and dielectric response. |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.120.117701 |
| Access URL: |
http://arxiv.org/abs/1712.03873 |
| Accession Number: |
edsarx.1712.03873 |
| Database: |
arXiv |
