Abstract

Density-functional studies of the perovskite structure ${\mathrm{SrRhO}}_{3}$ are reported using the full experimental orthorhombic crystal structure as well as a structure with relaxed atomic coordinates. A very soft ferromagnetic ground state is found as well as flat bands near the Fermi energy, ${E}_{F},$ that couple to the magnetism. As in the ruthenate magnets, a very large oxygen contribution to the magnetic moments is found. In light of experimental data for this compound, it is suggested that ${\mathrm{SrRhO}}_{3}$ is near a quantum critical point, and that the properties are substantially affected by quantum critical fluctuations.

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