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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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Published in: | 核技术(英文版) 2015-06, Vol.26 (3), p.77-81 |
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Main Author: | |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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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. |
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ISSN: | 1001-8042 2210-3147 |
DOI: | 10.13538/j.1001-8042/nst.26.030501 |