The sum rule for the moments of the spectral density is discussed for the single-band Hubbard model. It is shown that respecting the sum rule up to the order m 3 is conceptually important for a qualitatively correct description of the quasi-particle band structure in the strong-correlation regime. D
โฆ LIBER โฆ
Ferromagnetism in the Hubbard model and Hund's rule
โ Scribed by Andreas Mielke
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 272 KB
- Volume
- 174
- Category
- Article
- ISSN
- 0375-9601
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