The study investigates the spin and lattice excitations in the Kagome lattice antiferromagnet FeGe across the charge density wave (CDW) transition. Using neutron scattering, the researchers observed that spin excitations below 100 meV can be described by a spin-1 Heisenberg Hamiltonian, while higher-energy excitations, centered around the Brillouin zone boundary and extending up to 180 meV, are consistent with quasiparticle excitations across spin-polarized electron-hole Fermi surfaces. The c-axis spin wave dispersion and Fe-Ge optical phonon modes show a clear hardening below the CDW transition due to spin-charge-lattice coupling, but no evidence of a phonon Kohn anomaly. By comparing experimental results with density functional theory (DFT) calculations, the authors conclude that FeGe is a Hund's metal in the intermediate correlated regime, where magnetism arises from both itinerant and localized electrons. This unique system provides insights into the interplay between magnetic, charge, and lattice degrees of freedom.The study investigates the spin and lattice excitations in the Kagome lattice antiferromagnet FeGe across the charge density wave (CDW) transition. Using neutron scattering, the researchers observed that spin excitations below 100 meV can be described by a spin-1 Heisenberg Hamiltonian, while higher-energy excitations, centered around the Brillouin zone boundary and extending up to 180 meV, are consistent with quasiparticle excitations across spin-polarized electron-hole Fermi surfaces. The c-axis spin wave dispersion and Fe-Ge optical phonon modes show a clear hardening below the CDW transition due to spin-charge-lattice coupling, but no evidence of a phonon Kohn anomaly. By comparing experimental results with density functional theory (DFT) calculations, the authors conclude that FeGe is a Hund's metal in the intermediate correlated regime, where magnetism arises from both itinerant and localized electrons. This unique system provides insights into the interplay between magnetic, charge, and lattice degrees of freedom.