Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers
We predict that twisted bilayers of 1T-ZrS(2) realize a novel and tunable platform to engineer two-dimensional topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS(2) heterostructures give rise to an emergent and twist-controlled moiré Kagome lattice, co...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9395362/ https://www.ncbi.nlm.nih.gov/pubmed/35995779 http://dx.doi.org/10.1038/s41467-022-31604-w |
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author | Claassen, Martin Xian, Lede Kennes, Dante M. Rubio, Angel |
author_facet | Claassen, Martin Xian, Lede Kennes, Dante M. Rubio, Angel |
author_sort | Claassen, Martin |
collection | PubMed |
description | We predict that twisted bilayers of 1T-ZrS(2) realize a novel and tunable platform to engineer two-dimensional topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS(2) heterostructures give rise to an emergent and twist-controlled moiré Kagome lattice, combining geometric frustration and strong spin-orbit coupling to give rise to a moiré quantum spin Hall insulator with highly controllable and nearly-dispersionless bands. We devise a generic pseudo-spin theory for group-IV transition metal dichalcogenides that relies on the two-component character of the valence band maximum of the 1T structure at Γ, and study the emergence of a robust quantum anomalous Hall phase as well as possible fractional Chern insulating states from strong Coulomb repulsion at fractional fillings of the topological moiré Kagome bands. Our results establish group-IV transition metal dichalcogenide bilayers as a novel moiré platform to realize strongly-correlated topological phases in a twist-tunable setting. |
format | Online Article Text |
id | pubmed-9395362 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-93953622022-08-24 Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers Claassen, Martin Xian, Lede Kennes, Dante M. Rubio, Angel Nat Commun Article We predict that twisted bilayers of 1T-ZrS(2) realize a novel and tunable platform to engineer two-dimensional topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS(2) heterostructures give rise to an emergent and twist-controlled moiré Kagome lattice, combining geometric frustration and strong spin-orbit coupling to give rise to a moiré quantum spin Hall insulator with highly controllable and nearly-dispersionless bands. We devise a generic pseudo-spin theory for group-IV transition metal dichalcogenides that relies on the two-component character of the valence band maximum of the 1T structure at Γ, and study the emergence of a robust quantum anomalous Hall phase as well as possible fractional Chern insulating states from strong Coulomb repulsion at fractional fillings of the topological moiré Kagome bands. Our results establish group-IV transition metal dichalcogenide bilayers as a novel moiré platform to realize strongly-correlated topological phases in a twist-tunable setting. Nature Publishing Group UK 2022-08-22 /pmc/articles/PMC9395362/ /pubmed/35995779 http://dx.doi.org/10.1038/s41467-022-31604-w Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Claassen, Martin Xian, Lede Kennes, Dante M. Rubio, Angel Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers |
title | Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers |
title_full | Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers |
title_fullStr | Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers |
title_full_unstemmed | Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers |
title_short | Ultra-strong spin–orbit coupling and topological moiré engineering in twisted ZrS(2) bilayers |
title_sort | ultra-strong spin–orbit coupling and topological moiré engineering in twisted zrs(2) bilayers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9395362/ https://www.ncbi.nlm.nih.gov/pubmed/35995779 http://dx.doi.org/10.1038/s41467-022-31604-w |
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