Pressure Dependence of the Field-tuned Quantum Critical Point in CeCoIn5

Non-Fermi liquid behavior, as characterized by a T-linear resistivity and a T log(T) behavior in specific heat, is observed in zero field in the heavy fermion system CeCoIn$_{5}$. The application of magnetic field has revealed a field tuned quantum critical point surprisingly coincident with the superconducting H$_{c2}$. Neither field orientation nor Sn doping has been able to separate H$_{c2}$ from the quantum critical field implying that the two are more than accidentally linked together. We further investigate the nature of the quantum critical point with resistivity measurements under pressure and magnetic field simultaneously.