 4f-Virtual-Bound-State Formation in CeAl3 at Low Temperatures by Klaus Andres and others

The original CeAl3 measurements report the low-temperature electronic heat-capacity and quadratic-resistivity coefficients underlying its identification as a heavy fermion material. The published abstract gives both values and the measurement range below $0.2\mathrm{K}$.

Publisher: doi.org/10.1103/PhysRevLett.35.1779