Metal-insulator transition and intermediate phases in the kagome lattice Hubbard model

@article{Sun2021MetalinsulatorTA,
  title={Metal-insulator transition and intermediate phases in the kagome lattice Hubbard model},
  author={Rong-Yang Sun and Zheng Zhu},
  journal={Physical Review B},
  year={2021}
}
Motivated by the recent discovery of metallic kagome lattice materials, AV3Sb5 (A=K, Rb, Cs), we investigate the ground state of the half-filled kagome lattice Hubbard model by employing the density-matrix renormalization group (DMRG) method. We identify a metal-insulator transition around U ∼ Uc1 and four distinct phases as a function of U/t on narrower cylinders, including a metallic phase at U < Uc1, two insulating intermediate phases: a translational symmetry breaking phase at Uc1 < U < Uc2… 

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