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Pinball liquid phase from Hund's coupling in frustrated transition-metal oxides
2015
Physical Review B
The interplay of non-local Coulomb repulsion and Hund's coupling in the d-orbital manifold in frustrated triangular lattices is analyzed by a mutliband extended Hubbard model. We find a rich phase diagram with several competing phases, including a robust pinball liquid phase, which is an unconventional metal characterized by threefold charge order, bad metallic behavior and the emergence of high spin local moments. Our results naturally explain the anomalous charge-ordered metallic state
doi:10.1103/physrevb.91.165139
fatcat:2e4v7p2m7zaprpp7r3dork2weu