Morillo-Candas, Ana SofiaAugustin, SvenPrát, EduardSarracini, AntoineKnurr, JonasZerdane, SerhaneSun, ZhibinYang, NingchenRebholz, MarcZhang, HankaiDeng, YunpeiXie, XinhuaZyaee, ElnazRohrbach, DavidCannizzo, AndreaAl-Haddad, AndreSchnorr, KirstenOtt, C. D.Feurer, ThomasBostedt, C.Pfeifer, ThomasKnopp, Gregor2026-01-192026-01-192026-01-162026-01-1410.1038/s41586-025-09911-1https://infoscience.epfl.ch/handle/20.500.14299/258177enCoherent nonlinear X-ray four-photon interaction with core-shell electronstext::journal::journal article::research article