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Spectral properties near the Mott transition in the two-dimensional Hubbard model with next-nearest-neighbor hopping

The single-particle spectral properties near the Mott transition in the two-dimensional Hubbard model with next-nearest-neighbor hopping are investigated by using cluster perturbation theory. Complicated spectral features of this model are simply interpreted, by considering how the next-nearest-neighbor hopping shifts the spectral weights of the two-dimensional Hubbard model. Various anomalous features observed in hole-doped and electron-doped cuprate high-temperature superconductors are explained in a unified manner as properties near the Mott transition in a two-dimensional system whose spectral weights are shifted by next-nearest-neighbor hopping.

preprint2014arXivOpen access
Masanori Kohno
cond-mat.stat-mechcond-mat.supr-concond-mat.str-el
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Masanori Kohno

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