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Electron correlations and transport effective mass in narrow-band systems and the Hubbard model (1994)

Arai, Tadashi

New York, NY : Wiley-Blackwell

International Journal of Quantum Chemistry 49 (1994), S. 727-738

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ISSN: 0020-7608

Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The Hubbard model is rederived from a tight-binding band calculation, showing that, as long as parameters are properly chosen, the model is justified for calculating electronic properties of narrow-band systems. The treatment is extended by including correlations and it was found that bound solutions called dimers exist. The concept of dimers is found to be very powerful for understanding the unusual properties of heavy fermion systems. However, a Mott-Hubbard-like model may be required to calculate properties of high Tc cuprates. © 1994 John Wiley & Sons, Inc.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/qua.560490514

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