Magnetic phase diagram and Mott transition of the half-filled 1/5-depleted Hubbard model with frustration

Abstract

The magnetic properties and Mott transition of the half-filled Hubbard model on the 1/5 depleted square lattice with frustration is studied at zero temperature by the variational cluster approximation. The $(\pi ,\pi )$ Néel ordering (AF) is stable in a wide region of the phase diagram and almost completely veils the non-magnetic Mott transition for the unfrustrated case. However, AF is severely suppressed by the frustration and even with moderate frustrations the non-magnetic Mott transition takes place in the range where the intra-dimer hoppings are larger than the intra-plaquette hoppings.

arXiv comment4 pages, 4gigures

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Cited by in corpus (3)

• Single-orbital realization of high-temperature $s^{\pm }$ superconductivity in the square-octagon lattice
• Magnetic properties and Mott transition of the Hubbard model for weakly coupled chains on the anisotropic triangular lattice
• Direct observation of fragile Mott insulators on plaquette Hubbard lattices