Phase diagram of the 1/3-filled extended Hubbard model on the Kagome lattice

Abstract

We study the phase diagram of the extended Hubbard model on the kagome lattice at 1/3 filling. By combining a configuration interaction approach to an unrestricted Hartree-Fock, we construct an effective hamiltonian which takes the correlations back on top of the mean-field solution. We obtain a rich phase diagram with, in particular, the presence of two original phases. The first one consists of polarized droplets of metal standing on the hexagons of the lattice, and an enlarged kagome charge order, inversely polarized, on the remaining sites. The second, obeying a local ice-rule type constraint on the triangles of the kagome lattice, is driven by an antiferromagnetically coupling of spins and is constituted of disconnected 6-spin singlet rings. The nature and stability of these phases at large interactions is studied via variational wave functions and perturbation theory.

6 pages, 5 figures

References in corpus (13)

• Identifying Topological Order by Entanglement Entropy
• Projected wavefunction study of Spin-1/2 Heisenberg model on the Kagome lattice
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Properties of an algebraic spin liquid on the kagome lattice
• Ground State of the Kagome Lattice Heisenberg Antiferromagnet
• Interaction-driven topological insulators on the kagome and the decorated honeycomb lattices
• Valence Bond Solids and Their Quantum Melting in Hard-Core Bosons on the Kagome Lattice
• Mott transition in Kagomé lattice Hubbard model
• Anomalous Hall Effects of Light and Chiral Edge Modes on the Kagome Lattice
• Kinetic ferromagnetism on a kagome lattice
• Spin-Charge Separation in Two-dimensional Frustrated Quantum Magnets
• Impurity-doped Kagome Antiferromagnet: A Quantum Dimer Model Approach
• Bond order wave instabilities in doped frustrated antiferromagnets: "Valence bond solids" at fractional filling

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• Interaction-driven fractional quantum Hall state of hard-core bosons on kagome lattice at one-third filling
• Interplay of charge and spin fluctuations of strongly interacting electrons on the kagome lattice
• Intriguing Low-Temperature Phase in the Antiferromagnetic Kagome Metal FeGe
• Self-Trapped Polarons and Topological Defects in a Topological Mott Insulator
• Na order and Co charge disproportionation in Na${}_x$CoO${}_2$
• Quantum Phases of Kagome Electron System with Half-Filled Flat Bands
• Emergent chiral spin ordering and anomalous Hall effect of kagome lattice at 1/3 filling
• Hubbard model on the kagome lattice with time-reversal invariant flux and spin-orbit coupling
• Clusterization transition between cluster Mott insulators on a breathing Kagomé lattice
• Multiorbital kinetic effects on charge ordering of frustrated electrons on the triangular lattice
• Emergent lattices with geometrical frustration in doped extended Hubbard models
• Tuning electronic pairing by uniaxial strain in kagome lattices
• Ground state spin and excitation energies in half-filled Lieb lattices
• Topological Aspects of Dirac Fermions in a Kagomé Lattice
• Unconventional spin transport in strongly correlated kagome systems
• Altermagnetism in an interacting model of Kagome materials
• Charge-density waves in kagome-lattice extended Hubbard models at the van Hove filling