Plaquette bond order wave in the quarter-filled extended Hubbard model on the checkerboard lattice
arXiv:cond-mat/0609129 · doi:10.1103/PhysRevB.75.045105
Abstract
An extended Hubbard model (including nearest-neighbor repulsion and antiferromagnetic spin exchange) is investigated on the frustrated checkerboard lattice, a two-dimensional analog of the pyrochlore lattice. Combining Gutzwiller renormalized mean-field (MF) calculations, exact diagonalization (ED) techniques, and a weak-coupling renormalization group (RG) analysis we provide strong evidence for a crystalline valence bond plaquette phase at quarter-filling. The ground state is twofold degenerate and breaks translation symmetry. The bond energies show a staggering while the charge distribution remains uniform.
8 pages, 6 figures, published version
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Cited by in corpus (6)
- Simplex solids in SU(N) Heisenberg models on the kagome and checkerboard lattices
- Metallic phase in the two-dimensional ionic Hubbard model
- Doped Singlet-Pair Crystal in the Hubbard model on the checkerboard lattice
- Systematic Analysis of Frustration Effects in Anisotropic Checkerboard Lattice Hubbard Model
- Mixed Columnar-Plaquette Crystal of correlated fermions on the 2D pyrochlore lattice at fractional filling
- Exotic Mott phases of the extended t--J model on the checkerboard lattice at commensurate densities