Flat band separation and robust spin Berry curvature in bilayer kagome metals

D. Di Sante^*, C. Bigi, P. Eck, S. Enzner, A. Consiglio, G. Pokharel, P. Carrara, P. Orgiani, V. Polewczyk, J. Fujii, P.D.C. King, I. Vobornik, G. Rossi, I. Zeljkovic, S.D. Wilson, R. Thomale, G. Sangiovanni^*, G. Panaccione^*, F. Mazzola^*

^*Corresponding author for this work