Fleury, Romain2021-06-092021-06-092021-06-092021-06-0910.1038/s41567-021-01281-5https://infoscience.epfl.ch/handle/20.500.14299/178814Introducing non-local effects to metamaterials increases the complexity of their dispersion relation, which allows carefully designed elastic structures to mimic the peculiar roton behaviour of correlated quantum superfluids.metamaterialsnegative refractionbi-refringencerotonsquantum superfluidstext::journal::journal article::research article