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Angle-resolved photoemission spectroscopy in Hubbard model based on cluster perturbation

Angle-resolved photoemission spectra(ARPES) are calculated in the Hubbard model by using cluster perturbation method. It is found that in a cluster of 12 sites, the local density of states displays the phase transition from normal conductor to Mott insulator with the increase of the electron-electro...

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Bibliographic Details
Published in:核技术(英文版) 2015-06, Vol.26 (3), p.77-81
Main Author: 薛冰 任翠兰 张伟 朱志远
Format: Article
Language:English
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Summary:Angle-resolved photoemission spectra(ARPES) are calculated in the Hubbard model by using cluster perturbation method. It is found that in a cluster of 12 sites, the local density of states displays the phase transition from normal conductor to Mott insulator with the increase of the electron-electron coupling. We show that a pseudogap develops from the metallic phase to the insulating phase. Evidence of spin-charge separation is also verified in the calculated single particle spectral functions.
ISSN:1001-8042
2210-3147
DOI:10.13538/j.1001-8042/nst.26.030501