Kondo-lattice–mixed-valence resistance scaling in heavy-fermionCeCu6under pressure

From measurements of the electrical resistance of heavy-fermion ${\mathrm{CeCu}}_6$ subjected to hydrostatic pressures, we infer a continuous pressure-induced transition from Kondo-lattice to more strongly mixed-valence behavior. The resistance is found to scale over an appreciable temperature interval with a pressure-dependent characteristic temperature that reflects this transition. Similarities in the resistive behaviors of ${\mathrm{CeCu}}_6$ and ${\mathrm{CeAl}}_3$ are discussed.