Structural Phase Separation Couples to Charge-Density-Wave Formation in Kagome Metal FeGeRemoveBoyang Zhao, Youngjun Ahn, Qinwen Deng, Yidai Liu, Sijie Xu, Donald A. Walko, Stephan O. Hruszkewycz, Pengcheng Dai, Liang Wu, and Haidan WenPhys. Rev. Lett. 137, 146102 (2026)