Response of the heavy-fermion superconductor CeCoIn5 to pressure: roles of dimensionality and proximity to a quantum-critical point

We report measurements of the pressure-dependent superconducting transition temperature Tc and electrical resistivity of the heavy-fermion compound CeCoIn5. Pressure moves CeCoIn5 away from its proximity to a quantum-critical point at atmospheric pressure. Experimental results are qualitatively consistent with theoretical predictions for strong-coupled, d-wave superconductivity in an anisotropic three-dimensional superconductor. (author). Letter-to-the-editor