Hanoh Lee

Abstract Flat bands, electronic states with nearly dispersionless energy-momentum structure, provide fertile ground for unconventional quantum phases. Recent observations of flat bands at the Fermi level in kagome metals open the possibility of unifying topology and correlation-driven heavy-fermion physics. Here we show that topology and heavy-fermion correlations coexist in the layered kagome metal YbCr6Ge6.

Abstract Chemical substitution in correlated electron systems often produces asymmetric doping effects, where different dopants induce qualitatively distinct changes in electronic or magnetic properties, profoundly influencing phase diagrams and quantum criticality. Here, we investigate the chemical substitution effects of 5% Hg on CeRhIn5 by systematic transport measurements under pressure.