The existence of multiple superconducting phases induced by either pressure or magnetic field is one of the most striking features of superconductivity of ${\mathrm{UTe}}_2$, among the many unusual superconducting properties of this system. Here we report thermodynamic measurements of the superconducting phase diagram combining pressure and magnetic fields up to 30 T. We show that the high-field superconducting phase at ambient pressure continuously evolves under pressure into the zero-field high-temperature superconducting phase, which occurs above 0.2 GPa.

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• Spin-triplet pairing
• Superconducting phase transition
• Superconductivity
• Heavy-fermion systems
• Unconventional superconductors
• Specific heat measurements