Topological Moiré Platform Based on  Γ-point Twisting

ORAL

Abstract

Moiré engineering is rapidly moving beyond graphene, opening new routes to correlated and topological phenomena. In this talk, I will focus on moiré materials whose low-energy states lie at the Γ point, including both twisted bilayer and twisted multilayer architectures. Using large-scale ab initio calculations together with continuum models, we characterize their electronic structure, valley physics, and topological invariants. I will highlight the role of interlayer hybridization and mechanisms that enable isolated topological Γ-valley bands. These results broaden the moiré materials landscape and suggest experimentally accessible pathways to valley-selective and topology-driven phases.

*H.P. and M.G.V are supported by the Ministry for Digital Transformation and of Civil Service of the Spanish Government through the QUANTUM ENIA project call - Quantum Spain project, and by the European Union through the Recovery, Transformation and Resilience Plan - NextGenerationEU within the framework of the Digital Spain 2026 Agenda. Y.J. was supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 101020833), as well as by the IKUR Strategy under the collaboration agreement between Ikerbasque Foundation and DIPC on behalf of the Department of Education of the Basque Government. BAB and H.H. were supported by the Gordon and Betty Moore Foundation through Grant No. GBMF8685 towards the Princeton theory program, the Gordon and Betty Moore Foundation's EPiQS Initiative (Grant No. GBMF11070), the Office of Naval Research (ONR Grant No. N00014-20-1-2303), the Global Collaborative Network Grant at Princeton University, the Simons Investigator Grant No. 404513, the BSF Israel US foundation No. 2018226, the NSF-MERSEC (Grant No. MERSEC DMR 2011750), the Simons Collaboration on New Frontiers in Superconductivity (Grant No. SFI-MPS-NFS-00006741-01), Princeton Catalysis Initiative, and the Schmidt Foundation at the Princeton University.

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Presenters

  • Hanqi Pi

    • Donostia International Physics Center (DIPC)

Authors

  • Hanqi Pi

    • Donostia International Physics Center (DIPC)

  • Yves Kwan

    • University of Texas at Dallas
    • Princeton University

  • Haoyu Hu

    • Princeton University

  • Yi Jiang

    • Donostia International Physics Center

  • Dumitru Calugaru

    • University of Oxford

  • Maia G Vergniory

    • Université de Sherbrooke
    • Donostia International Physics Center
    • Département de physique et Institut quantique, Université de Sherbrooke, Sherbrooke J1K 2R1 QC, Canada
    • Université de Sherbrook
    • Universite de Sherbrooke

  • Andrei B Bernevig

    • Princeton University
    • Department of Physics, Princeton University