Two-dimensional electrons on the surface of an electride are found to exhibit a phase transition from a normal Fermi liquid to an interesting quantum liquid, which is probably a quantum version of an electronic crystal beyond the melting point.
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Fujimori, A. Electride surface hosts Wigner-crystal melting. Nat. Mater. 21, 1217–1218 (2022). https://doi.org/10.1038/s41563-022-01382-3
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DOI: https://doi.org/10.1038/s41563-022-01382-3
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