The valence transition of 4f electron states in rare-earth compounds is accompanied by a discontinuous change in the Kondo temperature. an energy scale tied to the interaction of the 4f states with the conduction-band states (c-f hybridization). The c-f hybridization causes the formation of heavy quasiparticle bands and produces a hybridization gap. Whether the hybridization gap devel... https://parisnaturalfoodes.shop/product-category/dulse-leaves/