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The precise form of the weighting function turns out to be unimportant for the final result, e.g., the form of the spectral function; the idea is here to reduce the weight of those (Formula presented) peaks that are at the edges of the spectrum of each cluster
-
The precise form of the weighting function turns out to be unimportant for the final result, e.g., the form of the spectral function; the idea is here to reduce the weight of those (Formula presented) peaks that are at the edges of the spectrum of each cluster.
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For a discussion of the validity of this simplest possible (Formula presented) model, see: S. Y. Ezhov, V. I. Anisimov, D. I. Khomskii, and G. A. Sawatzky, Phys. Rev. Lett. 83, 4136 (1999);
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85038336532
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The hopping matrix elements (Formula presented) in Eq. (10) are assumed to be chosen in such a way that antiferromagnetic long-range order is suppressed completely.6
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The hopping matrix elements (Formula presented) in Eq. (10) are assumed to be chosen in such a way that antiferromagnetic long-range order is suppressed completely.6
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44
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85038282410
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Although the term insulator is only strictly defined for (Formula presented), we denote a solution as insulating if it shows well separated upper and lower Hubbard peaks with only a small spectral weight at the Fermi level
-
Although the term insulator is only strictly defined for (Formula presented), we denote a solution as insulating if it shows well separated upper and lower Hubbard peaks with only a small spectral weight at the Fermi level.
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54
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85038309885
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This value of U, valid for (Formula presented), depends on temperature
-
This value of U, valid for (Formula presented), depends on temperature.
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