Bond order wave instabilities in doped frustrated antiferromagnets: "Valence bond solids" at fractional filling
arXiv:cond-mat/0603401 · doi:10.1103/PhysRevB.74.064429
Abstract
We explore both analytically and numerically the properties of doped t-J models on a class of highly frustrated lattices, such as the kagome and the pyrochlore lattice. Focussing on a particular sign of the hopping integral and antiferromagnetic exchange, we find a generic symmetry breaking instability towards a twofold degenerate ground state at a fractional filling below half filling. These states show modulated bond strengths and only break lattice symmetries. They can be seen as a generalization of the well-known valence bond solid states to fractional filling.
slightly shortened and reorganized version
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- Simplex Z_2 spin liquids on the Kagome lattice with Entangled Pair States: spinon and vison coherence lengths, topological entropy and gapless edge modes
- Weyl semimetal from spontaneous inversion symmetry breaking in pyrochlore oxides
- Turbulent hydrodynamics in strongly correlated Kagome metals
- Phase diagram of the 1/3-filled extended Hubbard model on the Kagome lattice
- Interplay of charge and spin fluctuations of strongly interacting electrons on the kagome lattice
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- Numerical study of magnetization plateaux in the spin-1/2 Heisenberg antiferromagnet on the checkerboard lattice
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- Doping on the kagome lattice: A variational Monte-Carlo study of the model
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