High Field Specific Heat of the Cuprate Superconductor LSCO across the Phase Diagram*

Several samples of superconducting LSCO have been measured in specific heat experiments in magnetic fields up to 45 Teslas. The evolution of the electronic density of states is examined as a function of field and doping to reveal the nature of the vortex and normal state quasi-particle contributions within the zero-field superconducting regime.