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Effective Hamiltonian of the Two-band Hubbard Model: An Exact Result

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Date

2002

Authors

Chan, R
Gulacsi, Miklos

Journal Title

Journal ISSN

Volume Title

Publisher

Taylor & Francis Group

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.

Description

Keywords

Keywords: Calculations; Copper oxides; Hamiltonians; Mathematical models; Mathematical transformations; Oxide superconductors; Charge-transfer gap; Infinite order; Two-band Hubbard model; Perturbation techniques

Citation

URI

http://hdl.handle.net/1885/91882

Collections

ANU Research Publications

Source

Philosophical Magazine Letters

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1080/0950083021000036670

Restricted until

2037-12-31

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01_Chan_Effective_Hamiltonian_of_the_2002.pdf (454.36 KB)
02_Chan_Effective_Hamiltonian_of_the_2002.pdf (247.2 KB)

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