Tunable free-electron X-ray radiation from van der Waals materials

Michael Shentcis, Adam K. Budniak, Xihang Shi, Raphael Dahan, Yaniv Kurman, Michael Kalina, Hanan Herzig Sheinfux, Mark Blei, Mark Kamper Svendsen, Yaron Amouyal, Sefaattin Tongay, Kristian Sommer Thygesen, Frank H.L. Koppens, Efrat Lifshitz, F. Javier García de Abajo, Liang Jie Wong, Ido Kaminer