From Mott insulator to ferromagnetic metal: a pressure study of Ca$_{2}$RuO$_{4}$

Details From Mott insulator to ferromagnetic metal: a pressure study of Ca$_{2}$RuO$_{4}$ From Mott insulator to ferromagnetic metal: a pressure study of Ca$_{2}$RuO$_{4}$

2002-03-08

arxiv.org/abs/cond-mat/0203180v2

Phys. Rev. B 65, 220402(R) (2002).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4figures

Scientific paper

10.1103/PhysRevB.65.220402

We show that the pressure-temperature phase diagram of the Mott insulator Ca$_{2}$RuO$_{4}$ features a metal-insulator transition at 0.5GPa: at 300K from paramagnetic insulator to paramagnetic quasi-two-dimensional metal; at $T \leq$ 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 Sr$_{2}$RuO$_{4}$, and discuss the importance of structural distortions, which are expected to couple strongly to pressure.

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