Itinerant ferromagnetism in the two-dimensional t-t′ Hubbard model
Using exact diagonalization techniques, the Hubbard model with hopping between nearest (t) and next-nearest neighbors (t′) is studied in a two-dimensional cluster with 4×4 sites. Within a range of values of t′ <0 and low densities, states with different total spin are degenerate in the noninterac...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
2000
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| LEADER | 04155caa a22006017a 4500 | ||
|---|---|---|---|
| 001 | PAPER-20868 | ||
| 003 | AR-BaUEN | ||
| 005 | 20241001121743.0 | ||
| 008 | 190411s2000 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0034667057 | |
| 030 | |a PRBMD | ||
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Arrachea, Liliana del Carmen | |
| 245 | 1 | 0 | |a Itinerant ferromagnetism in the two-dimensional t-t′ Hubbard model |
| 260 | |c 2000 | ||
| 270 | 1 | 0 | |m Arrachea, L.; Departamento de Física, Facultad de Ciencias Exactas, Universidad de Buenos Aires, Pabellón 1, (1428) Buenos Aires, Argentina |
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| 504 | |a Vollhardt, D., Blümer, N., Held, K., Kollar, M., Schlipf, J., Ulmke, M., Wahle, J., cond-mat/9804112 (unpublished); Wegner, T., Potthoff, M., Nolting, W., (1998) Phys. Rev. B, 57, p. 6211 | ||
| 504 | |a Wahle, J., Blümer, N., Schlipf, J., Held, K., Vollhardt, D., (1998) Phys. Rev. B, 58, p. 12749 | ||
| 504 | |a Arrachea, L., Aligia, A., (2000) Phys. Rev. B, 61, p. 9686 | ||
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| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a Using exact diagonalization techniques, the Hubbard model with hopping between nearest (t) and next-nearest neighbors (t′) is studied in a two-dimensional cluster with 4×4 sites. Within a range of values of t′ <0 and low densities, states with different total spin are degenerate in the noninteracting system. At a finite value of the Coulomb repulsion U, states with high spin are energetically favored and the ground state can be fully polarized. The behavior of the density of states differs from that obtained within the Hartree-Fock approximation. The low energy region of the density of states (DOS) for the majority spins remains weakly modified by U. Our results bring further support to the idea that itinerant ferromagnetism occurs in strongly correlated systems with high noninteracting DOS at the bottom of the band. |l eng | |
| 593 | |a Departamento de Física, Facultad de Ciencias Exactas, Universidad de Buenos Aires, Pabellón 1, (1428) Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a ACCELERATION |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a DENSITY |
| 690 | 1 | 0 | |a ENERGY TRANSFER |
| 690 | 1 | 0 | |a MAGNETISM |
| 690 | 1 | 0 | |a MATHEMATICAL MODEL |
| 690 | 1 | 0 | |a MOLECULAR INTERACTION |
| 773 | 0 | |d 2000 |g v. 62 |h pp. 10033-10037 |k n. 15 |p Phys. Rev. B Condens. Matter Mater. Phys. |x 01631829 |w (AR-BaUEN)CENRE-397 |t Physical Review B - Condensed Matter and Materials Physics | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034667057&doi=10.1103%2fPhysRevB.62.10033&partnerID=40&md5=8d41d8e1591ab742cda22d038967df2f |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1103/PhysRevB.62.10033 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_01631829_v62_n15_p10033_Arrachea |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v62_n15_p10033_Arrachea |y Registro en la Biblioteca Digital |
| 961 | |a paper_01631829_v62_n15_p10033_Arrachea |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||
| 999 | |c 81821 | ||