Interplay of orbitally polarized and magnetically ordered phases in doped transition metal oxides

Abstract

We investigate the magnetic instabilities of the two-dimensional model of interacting e_g electrons for hole doping away from two electrons per site in the mean-field approximation. In particular, we address the occurrence of orbitally polarized states due to the inequivalent orbitals, and their interplay with ferromagnetic and antiferromagnetic spin order. The role played by the Hund's exchange coupling J_H and by the crystal field orbital splitting E_z in stabilizing one of the competing phases is discussed in detail.

7 pages, 4 figures

References in corpus (3)

• Orbital-selective Mott transitions in the degenerate Hubbard model
• Slave-rotor mean field theories of strongly correlated systems and the Mott transition in finite dimensions
• Orbital Ordering, New Phases, and Stripe Formation in Doped Layered Nickelates

Cited by in corpus (6)

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• Magnetic ordering in the striped nickelate La5/3Sr1/3NiO4: A band structure point of view
• Magnetic and orbital correlations in a two-site molecule
• Magnetic transitions in strong coupling expansions for nearly degenerate states
• Bad metal and negative compressibility transitions in a two-band Hubbard model