TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.16.2.059
TI  - Mott transition and pseudogap of the square-lattice Hubbard model: Results from center-focused cellular dynamical mean-field theory
PY  - 2024/02/27
UR  - https://www.scipost.org/SciPostPhys.16.2.059
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 16
IS  - 2
SP  - 059
A1  - Meixner, Michael
AU  - Menke, Henri
AU  - Klett, Marcel
AU  - Heinzelmann, Sarah
AU  - Andergassen, Sabine
AU  - Hansmann, Philipp
AU  - Schäfer, Thomas
AB  - The recently proposed center-focused post-processing procedure [Phys. Rev. Res. 2, 033476 (2020)] of cellular dynamical mean-field theory suggests that central sites of large impurity clusters are closer to the exact solution of the Hubbard model than the edge sites. In this paper, we systematically investigate results in the spirit of this center-focused scheme for several cluster sizes up to 8×8 in and out of particle-hole symmetry. First we analyze the metal-insulator crossovers and transitions of the half-filled Hubbard model on a simple square lattice. We find that the critical interaction of the crossover is reduced with increasing cluster sizes and the critical temperature abruptly drops for the 4×4 cluster. Second, for this cluster size, we apply the center-focused scheme to a system with more realistic tight-binding parameters, investigating its pseudogap regime as a function of temperature and doping, where we find doping dependent metal-insulator crossovers, Lifshitz transitions and a strongly renormalized Fermi-liquid regime. Additionally to diagnosing the real space origin of the suppressed antinodal spectral weight in the pseudogap regime, we can infer hints towards underlying charge ordering tendencies.
ER  -

@Article{10.21468/SciPostPhys.16.2.059,
	title={{Mott transition and pseudogap of the square-lattice Hubbard model: Results from center-focused cellular dynamical mean-field theory}},
	author={Michael Meixner and Henri Menke and Marcel Klett and Sarah Heinzelmann and Sabine Andergassen and Philipp Hansmann and Thomas Schäfer},
	journal={SciPost Phys.},
	volume={16},
	pages={059},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.16.2.059},
	url={https://scipost.org/10.21468/SciPostPhys.16.2.059},
}