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Volume 16 Issue 5, May 2021

Volume 16 Issue 5

Tunable band structure anisotropy in 1D superlattice graphene

Integration of artificially designed and spatially periodic superlattices (SLs) with graphene and other 2D materials offers a powerful tool for band-structure engineering of 2D van der Waals crystals. By patterning graphene with a 1D SL, a periodically varying electric potential along one axis can be designed to induce high anisotropy of the energy-momentum relation between the directions parallel and perpendicular to the SL. Furthermore, applying an electric field along one of the directions provides the possibility to further tune the SL-induced anisotropic electronic properties of such a hybrid graphene system. The cover is an artistic representation of the band structure of 1D SL graphene, where electrostatic tuning can be used to flatten and unflatten a given Dirac cone resulting in the observation of new features such as anisotropic flattened Dirac points, and side Dirac points at charge neutrality.

Dean, Letter

IMAGE: Pilkyung Moon, New York University Shanghai. COVER DESIGN: Bethany Vukomanovic.

Editorial

  • Editorial |

    Research on nanoplastic has already provided some significant results but it has also exposed a large number of open questions.

Correspondence

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News & Views

  • News & Views |

    Localized zero-energy fermionic states can bind to topological defects such as two-dimensional vortices, which can be realized in the bulk of artificial acoustic and optical lattices.

    • Penglin Gao
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    Near-field optical microscopy reveals unique nanoscale domain structures of Moiré patterns in minimally twisted bilayer graphene via the photothermoelectric effect.

    • Alexey Y. Nikitin

Perspectives

  • Perspective |

    This Perspective aims to place nanoplastics in the context of global plastic pollution by assessing its sources and risks, and by assessing commonalities nanoplastics may share with other nanosized objects in environmental systems.

    • Denise M. Mitrano
    • Peter Wick
    • Bernd Nowack
  • Perspective |

    This Perspective examines how the characteristics of nanoplastic impact environmental fate, potential effects on biota and human health, sampling and analysis in a different way from either microplastic or engineered nanomaterials.

    • Julien Gigault
    • Hind El Hadri
    • Mark Wiesner

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