Abstract
We report resistivity, , and specific-heat, , results on near stoichiometric samples, in the vicinity of a quantum critical point (QCP). The latter is defined by , where marks the transition into a spin-density–wave-type “phase ” which competes with heavy-fermion superconductivity below . Upon approaching the QCP, and behave very disparately, suggesting a breakup of the heavy quasiparticles. Very surprising observations are being made for samples with also.
- Received 23 October 1997
DOI:https://doi.org/10.1103/PhysRevLett.81.1501
©1998 American Physical Society