Guo, Q., Esin, I., Li, C., Chen, C., Han, G., Liu, S., Edgar, J. H., Zhou, S., Demler, E., Refael, G., Xia, F. (2025). Hyperbolic phonon-polariton electroluminescence in 2D heterostructures. Nature. https://doi.org/10.1038/s41586-025-08686-9