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Anti-topological crystal and non-Abelian liquid in twisted semiconductor bilayers
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0002-9739-2930
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Number of Authors: 52026 (English)In: Nature Communications, E-ISSN 2041-1723, Vol. 17, no 1, article id 3814Article in journal (Refereed) Published
Abstract [en]

We show that electron crystals compete closely with non-Abelian fractional Chern insulators in the half-filled second moir & eacute; band of twisted bilayer MoTe2. Depending on the twist angle and microscopic model, these crystals can have non-zero or zero Chern numbers C. The C = 0 crystal occurs because contributions to the total Chern number from the full first band (+1) and half-full second band (-1) cancel. This is counterintuitive because the first two non-interacting bands in a given valley have the same Chern number + 1. For these two reasons, we call this crystal an anti-topological crystal. The anti-topological crystal is a novel type of electron crystal that may occur in systems with multiple Chern bands at filling factors n > 1.

Place, publisher, year, edition, pages
2026. Vol. 17, no 1, article id 3814
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Condensed Matter Physics
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URN: urn:nbn:se:su:diva-255396DOI: 10.1038/s41467-026-70916-zISI: 001752341000002PubMedID: 42034620Scopus ID: 2-s2.0-105037068315OAI: oai:DiVA.org:su-255396DiVA, id: diva2:2059909
Available from: 2026-05-13 Created: 2026-05-13 Last updated: 2026-05-13Bibliographically approved

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Johansson Bergholtz, Emil

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