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- W1998767638 abstract "A new canonical transformation is applied to the Hubbard Hamiltonian under strong correlation with arbitrary n to obtain an effective Hamiltonian which consists of both the itinerant property of electrons in split sub-bands and the Heisenberg-type spin-spin coupling. It reduces to that for a Heisenberg antiferromagnet as t/U to 0, but the intrasub-band electron hopping becomes important as t/U increases. This effective Hamiltonian is suitable for investigating the antiferro-paramagnetic transition." @default.
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- W1998767638 date "1977-05-28" @default.
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- W1998767638 title "Kinetic exchange interaction in a narrow S-band" @default.
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- W1998767638 doi "https://doi.org/10.1088/0022-3719/10/10/002" @default.
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