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- W4320165769 abstract "We apply the recently-developed slave fermion approach to study the doped Mott insulator in the one-band Hubbard model. Our results produce several subtle features in the electron spectra and confirm the key role of antiferromagnetic (AFM) correlations on the appearance of the pseudogap. Upon hole doping, the electron spectra exhibit a single peak near the Fermi energy in the absence of AFM correlations. When AFM correlations are included, a second peak emerges at slightly lower energy and pushes the other peak to higher energy, so that a pseudogap emerges between the two peaks at small doping. Both peaks grow rapidly with increasing doping and eventually merge together, where the pseudogap no longer exists. Detailed analyses of the spectral evolution with doping and AFM correlations as well as its momentum dependence confirm that the lower-energy peak comes from a polaronic mechanism due to the holon-spinon interaction in the AFM correlated background and the higher-energy peak arises from the holon hybridization to form the electron quasiparticles. Thus, the pseudogap arises from the interplay of the polaronic and hybridization mechanisms. Our results are in good agreement with previous numerical calculations using the dynamical mean-field theory and its cluster extensions, but give a clearer picture of the underlying physics. Our work provides a promising perspective for clarifying the nature of doped Mott insulators and may serve as a starting point for more elaborate investigations in the future." @default.
- W4320165769 created "2023-02-13" @default.
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- W4320165769 date "2023-02-09" @default.
- W4320165769 modified "2023-09-27" @default.
- W4320165769 title "A slave fermion interpretation of the pseudogap in doped Mott insulator" @default.
- W4320165769 doi "https://doi.org/10.48550/arxiv.2302.04620" @default.
- W4320165769 hasPublicationYear "2023" @default.
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