Effective Hamiltonian of the two-band Hubbard model: An exact result

Raymond Chan; Miklós Gulácsi

doi:10.1080/0950083021000036670

Effective Hamiltonian of the two-band Hubbard model: An exact result

Raymond Chan^*, Miklós Gulácsi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

An effective Hamiltonian for the two-band Hubbard model was derived by a canonical transformation which was calculated and summed up to infinite order. The transformed Hamiltonian contains terms with strongly renormalized interaction energies. These new interaction energies show sign reversals as a function of the hopping integral in addition to a strong reduction in the charge-transfer gap and a significant increase in the attractive oxygen Hubbard term.

Original language	English
Pages (from-to)	671-680
Number of pages	10
Journal	Philosophical Magazine Letters
Volume	82
Issue number	12
DOIs	https://doi.org/10.1080/0950083021000036670
Publication status	Published - Dec 2002

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10.1080/0950083021000036670

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abstract = "An effective Hamiltonian for the two-band Hubbard model was derived by a canonical transformation which was calculated and summed up to infinite order. The transformed Hamiltonian contains terms with strongly renormalized interaction energies. These new interaction energies show sign reversals as a function of the hopping integral in addition to a strong reduction in the charge-transfer gap and a significant increase in the attractive oxygen Hubbard term.",

author = "Raymond Chan and Mikl{\'o}s Gul{\'a}csi",

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AB - An effective Hamiltonian for the two-band Hubbard model was derived by a canonical transformation which was calculated and summed up to infinite order. The transformed Hamiltonian contains terms with strongly renormalized interaction energies. These new interaction energies show sign reversals as a function of the hopping integral in addition to a strong reduction in the charge-transfer gap and a significant increase in the attractive oxygen Hubbard term.

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JO - Philosophical Magazine Letters

JF - Philosophical Magazine Letters

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Effective Hamiltonian of the two-band Hubbard model: An exact result

Abstract

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