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Showing 1–7 of 7 results
Advanced filters: Author: Ivan V. Dyakonov Clear advanced filters

  • Plasmons confined in field effect transistors were long envisioned for resonant detection of light at THz frequencies, however realization of such photodetectors has proven challenging. Here, the authors fabricate antenna-coupled graphene transistors which exhibit resonant photoresponse to incident radiation and use them to study plasmons in graphene and its moiré superlattices.

    • Denis A. Bandurin
    • Dmitry Svintsov
    • Georgy Fedorov
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8

  • Here, authors report spin transport in dual-gated, high-mobility bilayer graphene spin valves. Their comparative study suggests that substrate and contacts are not the key limiting sources for spin relaxation, but rather it pinpoints the role of polymer residues in current devices. Spin transport in bilayer graphene is gate tunable and this allows authors to demonstrate the evidence of magnetic moments which act as spin hot spots. By taking the advantage of their novel device architecture, they demonstrate the complete suppression of the spin signal while a transport gap was induced in these spin valve devices.

    • Ahmet Avsar
    • Ivan Jesus Vera-Marun
    • Barbaros Özyilmaz
    ResearchOpen Access
    NPG Asia Materials
    Volume: 8, P: e274

  • Higher order topological insulators (HOTIs) can provide an extension of the bulk-boundary correspondence associated with topological insulators, with more exotic physics behind localization of excitations at their boundaries and corners. Here, the authors propose a method for creating a class of HOTIs with unconventional boundary truncations, where the emergence of localized boundary modes of topological origin is associated with fractional Wannier centers and occurs across much broader parameter space in comparison with usual HOTIs.

    • Changming Huang
    • Alexander V. Kireev
    • Victor N. Zadkov
    ResearchOpen Access
    Communications Physics
    Volume: 8, P: 1-11

  • The formation of solitons of topological origin is observed on disclination cores of pentagonal and heptagonal disclination arrays. Nonlinearity profoundly affects localization of such solitons that form as exceptionally robust objects in topological gap.

    • Boquan Ren
    • Antonina A. Arkhipova
    • Victor N. Zadkov
    ResearchOpen Access
    Light: Science & Applications
    Volume: 12, P: 1-12