A condensate of excitons was theoretically conjectured in the 1960s but has been challenging to pinpoint experimentally. Evidence has now emerged that it could be the ground state of tungsten ditelluride, a rich topological material.
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Pereira, V.M. Topological excitons. Nat. Phys. 18, 6–7 (2022). https://doi.org/10.1038/s41567-021-01466-y
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DOI: https://doi.org/10.1038/s41567-021-01466-y
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