A novel heavy-fermion state in CaCu_3Ru_4O12

W. Kobayashi, I. Terasaki, J. Takeya +2

We have measured susceptibility, specific heat, resistivity, and thermopower of CaCu${}_3$Ti${}_{4-x}$Ru${}_x$O${}_{12}$ and CaCu${}_{3-y}$Mn${}_y$Ru${}_4$O${}_{12}$, and have found that CaCu${}_3$R…