Doped Mott insulator on Penrose tiling
arXiv:2201.05432 · doi:10.1103/PhysRevB.105.205138
Abstract
We study the effect of carrier doping to the Mott insulator on the Penrose tiling, aiming at clarifying the interplay between quasiperiodicity and strong electron correlations. We numerically solve the Hubbard model on the Penrose-tiling structure within a real-space dynamical mean-field theory, which can deal with a singular self-energy necessary to describe the Mott insulator and spatial inhomogeneity. We find that the strong correlation effect produces a charge distribution unreachable by a static mean-field approximation. In a small doping region, the spectrum shows a site-dependent gap just above the Fermi energy, which is generated by a singularly large self-energy emergent from the Mott physics and regarded as a real-space counterpart of the momentum-dependent pseudogap observed in a square-lattice Hubbard model.
arXiv comment6 pages, 8 figures
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- Unconventional superfluidity of superconductivity on Penrose lattice
- Superconductivity and charge-density-wave in the Holstein model on the Penrose Lattice
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