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Originalpublikation
Nakano, K.; Shirakawa, T.; Ohta, Y.: Nonquasiparticle states in the half-metallic ferromagnet simulated by the two-band Hubbard model. In: Journal of Physics: Conference Series 200 (2010), 12143. DOI: https://doi.org/10.1088/1742-6596/200/1/012143
Version im Repositorium
Zum Zitieren der Version im Repositorium verwenden Sie bitte diesen DOI:
https://doi.org/10.15488/1436
| Zusammenfassung: | |
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The density-matrix renormalization group method is used to study the three-band zigzag ladder model that simulates the electronic state of the t 2g-orbital system of the double string of the edge-shared CrO 6 octahedra in the half-metallic ferromagnet K2Cr 8O16. The saturated ferromagnetism caused by the double-exchange mechanism is thereby demonstrated. We also use the Lanczos exact-diagonalization technique on small clusters to study the two Hubbard chains coupled with the ferromagnetic exchange interaction, whereby we consider the nonquasiparticle states in the half-metallic ferromagnet that appear in the single-particle spectral function.
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| Lizenzbestimmungen: | CC BY 3.0 Unported - https://creativecommons.org/licenses/by/3.0/ |
| Publikationstyp: | Article |
| Publikationsstatus: | publishedVersion |
| Erstveröffentlichung: | 2010 |
| Schlagwörter (englisch): | Density matrix renormalization group, Diagonalization techniques, Double exchange mechanism, Double string, Ferromagnetic exchange interaction, Half-metallic ferromagnets, Hubbard, Ladder model, Lanczos, Single-particle spectral function, Small clusters, Two-band Hubbard model, Chromium, Computer simulation, Electronic states, Ferromagnetic materials, Hubbard model, Magnets, Spectroscopy, Statistical mechanics, Strontium compounds, Superconducting materials, Ferromagnetism |
| Fachliche Zuordnung (DDC): | 530 | Physik |
| Kontrollierte Schlagwörter: | Konferenzschrift |
Die Publikation erscheint in Sammlung(en):
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Fakultät für Mathematik und Physik
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