We show that the pressure-temperature phase diagram of the Mott insulator
Ca2​RuO4​ features a metal-insulator transition at 0.5GPa: at 300K from
paramagnetic insulator to paramagnetic quasi-two-dimensional metal; at T≤
12K from antiferromagnetic insulator to ferromagnetic, highly anisotropic,
three-dimensional metal. % We compare the metallic state to that of the
structurally related p-wave superconductor Sr2​RuO4​, and discuss the
importance of structural distortions, which are expected to couple strongly to
pressure.Comment: 4 pages, 4figure