High-pressure resistivity of CeCoIn$_5$ at low temperatures using four-point probe technique and finite element analysis

We performed high-pressure electronic characterization of the heavy fermion superconductor, CeCoIn$_5$. Using a designer diamond anvil four-point probe system, we measured the temperature-dependent resistivity up to 25 GPa and found evidence for a decrease in the effective mass at high pressures. We determined the resistivity using Van Der Pauws method and a finite element analysis approach. Room temperature resistivity with increasing pressure was also measured and a maximum in resistivity was observed near $\sim$8 GPa. These data suggest the existence of a pressure-dependent modification of the 4$f$ hybridization at the highest pressures