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Graphene

Plasmons in moiré superlattices

Nature Materials volume 14, pages 1187–1188 (2015)Cite this article

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The propagation of plasmons in graphene–hexagonal boron nitride moiré patterns is experimentally studied for the first time via infrared scattering near-field optical spectroscopy.

Hexagonal boron nitride (hBN), a wide-bandgap insulator, has gained a lot of attention lately as a substrate for graphene. hBN is free of dangling bonds, atomically flat and presents a much smaller number of charge traps than SiO2. As a consequence, graphene sheets deposited on hBN (ref. 1) or encapsulated between hBN crystals2,3 tend to have much larger mobilities than those that are deposited on SiO2.

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Figure 1: Graphene–hBN moiré superlattices.

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Authors and Affiliations

  1. Marco Polini is at the Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, I-16163 Genova, Italy, and at the Scuola Normale Superiore, I-56126 Pisa, Italy,

    Marco Polini

  2. Frank H. L. Koppens is at the ICFO-Institut de Ciencies Fotoniques, Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain and at the ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain,

    Frank H. L. Koppens

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  1. Marco Polini
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  2. Frank H. L. Koppens
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Correspondence to Marco Polini or Frank H. L. Koppens.

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Polini, M., Koppens, F. Plasmons in moiré superlattices. Nature Mater 14, 1187–1188 (2015). https://doi.org/10.1038/nmat4496

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