Thermal transport at a field-tuned quantum critical point in CeCoIn5

The heavy-fermion metal CeCoIn5 exhibits a field-tuned quantum critical point which coincides with the upper critical field for superconductivity for directions of magnetic field both parallel [1] and perpendicular to the tetragonal c-axis of the material [2]. Here we report a study of this field-tuned critical point using electrical resistivity and thermal conductivity measurements performed in magnetic fields parallel to the conducting plane. [1] J. Paglione et al., Phys. Rev. Lett. 91, 246405 (2003). [2] F. Ronning et al., Phys. Rev. B. 71, 104528 (2005).