Wigner crystals have been observed in transition metal dichalcogenides, but their collective excitations have not been shown. Now the signatures of these excita

Wigner crystals have been observed in transition metal dichalcogenides, but their collective excitations have not been shown. Now the signatures of these excitations are revealed in the optical spectra of a charge-tunable monolayer semiconductor. [↧](https://t.co/0eFRI2mmp…