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Showing 1–8 of 8 results
Advanced filters: Author: Raul Perea-Causin Clear advanced filters

  • Quantum anomalous Hall crystals (QAHCs) combine the zero-field quantum Hall effect with spontaneously broken discrete translation symmetry. Here, the authors use exact diagonalization to demonstrate the existence of stable QAHCs arising from 2/3-filled moiré bands with Chern number C = 2.

    • Raul Perea-Causin
    • Hui Liu
    • Emil J. Bergholtz
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-7

  • Parafermions hold promise as building blocks for topological quantum computers but have remained experimentally elusive. Here, the authors employ numerical calculations to demonstrate that parafermion excitations can emerge in partially filled moiré minibands of twisted multilayer graphene systems.

    • Hui Liu
    • Raul Perea-Causin
    • Emil J. Bergholtz
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-7

  • Using short pulses in the terahertz spectral range following optical injection, ultrafast excitation of trions to excitons and free carriers in monolayer MoSe2 can be realized within picoseconds, advancing nanoscale optoelectronics devices.

    • Tommaso Venanzi
    • Marzia Cuccu
    • Alexey Chernikov
    Research
    Nature Photonics
    Volume: 18, P: 1344-1349

  • Here, the authors combine theory and photoluminescence measurements on WSe2 bilayers and demonstrate the electrical tunability of the trion energy landscape, by showing that an out-of-plane electric field modifies the energetic ordering of the lowest lying trion states.

    • Raul Perea-Causin
    • Samuel Brem
    • Ermin Malic
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8

  • The dipole-dependent propagation of hybrid excitons in a van der Waals heterostructure containing a WSe2 bilayer is characterized by modulating the layer hybridization and interplay between many-body interactions of excitons with an applied vertical electric field.

    • Fedele Tagarelli
    • Edoardo Lopriore
    • Andras Kis
    ResearchOpen Access
    Nature Photonics
    Volume: 17, P: 615-621

  • Strain engineering can manipulate the propagation of excitons in atomically thin transition metal dichalcogenides. Here, the authors observe an anti-funnelling behavior, i.e., the exciton photoluminescence moves away from high-strain regions, and attribute it to the dominating role of propagating dark excitons.

    • Roberto Rosati
    • Robert Schmidt
    • Ermin Malic
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • In this Comment, the authors discuss the current status, the challenges, and potential technological impact of exciton transport in transition metal dichalcogenide (TMD) monolayers, lateral and vertical heterostructures as well as moiré excitons in twisted TMD heterostacks.

    • Ermin Malic
    • Raül Perea-Causin
    • Samuel Brem
    Comments & OpinionOpen Access
    Nature Communications
    Volume: 14, P: 1-4