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Showing 1–4 of 4 results
Advanced filters: Author: Birui Yang Clear advanced filters

  • The nature of correlated insulator states commonly observed in moiré superlattices are still under investigation. Here, the authors use pump-probe spectroscopy to study the dynamics of correlated insulator states in a WSe2/WS2 moiré heterostructure at two different fillings, elucidating distinct time-domain signatures associated with these states.

    • Eric A. Arsenault
    • Yiliu Li
    • X.-Y. Zhu
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8

  • Recent experiments have shown the formation of ferroelectric domains in twisted van der Waals bilayers. Here, the authors report near-field infrared nano-imaging and nano-photocurrent measurements to investigate ferroelectricity in minimally twisted WSe2 by visualizing the plasmonic and photo-thermoelectric response of an adjacent graphene monolayer.

    • Shuai Zhang
    • Yang Liu
    • D. N. Basov
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • Researchers created a periodically poled van der Waals semiconductor (3R-MoS2) and achieved a macroscopic frequency conversion efficiency of 0.03% over a thickness of 3.4 μm. The quasi-phase-matched second harmonic signal surpasses the usual quadratic enhancement by 50% and broadband generation of photon pairs at telecom wavelength is demonstrated with a coincidence-to-accidental ratio of 638 ± 75.

    • Chiara Trovatello
    • Carino Ferrante
    • P. James Schuck
    Research
    Nature Photonics
    Volume: 19, P: 291-299

  • Twisted double bilayer graphene is a novel van der Waals system that hosts an electric-field-tunable correlated state at half-filling. Here the authors reveal the delocalized nature of this state by scanning tunnelling microscopy and spectroscopy, suggesting an underlying mechanism of symmetry breaking driven by non-local exchange.

    • Canxun Zhang
    • Tiancong Zhu
    • Michael F. Crommie
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8