Abstract:
We consider the Kondo-Hubbard model with ferromagnetic exchange coupling JH, showing that it is an approximate effective model for late transition-metal–O linear systems. We study the dependence of the charge and spin gaps ΔC,ΔS, and several spin-spin correlation functions, including the hidden order parameter Z(π), all properties converge slowly to the strong-coupling limit. When JH/t 2 and U/t 7 (the effective parameters that we obtain for Y2BaNiO5), ΔS is roughly half of the value expected from a strong-coupling expansion. © 1999 The American Physical Society.
Registro:
| Documento: |
Artículo
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| Título: | Influence of finite hund rules and charge transfer on properties of haldane systems |
| Autor: | Feiguin, A.E.; Arrachea, L.; Aligia, A.A. |
| Filiación: | Instituto de Física Rosario (CONICET-UNR), Rosario, 2000, Argentina
PUC-Rio, Departamento de Fisica, Caixa Postal 38071, Cep, Rio de Janeiro, RJ, 22452-970, Brazil
Depto. De Física, Universidad Nacional de Buenos Aires, Pabellon I, Ciudad Universitaria (1428), Buenos Aires, Argentina
Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, Bariloche, 8400, Argentina
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| Año: | 1999
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| Volumen: | 59
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| Número: | 15
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| Página de inicio: | 9916
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| Página de fin: | 9922
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| DOI: |
http://dx.doi.org/10.1103/PhysRevB.59.9916 |
| Título revista: | Physical Review B - Condensed Matter and Materials Physics
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| Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys.
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| ISSN: | 10980121
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| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v59_n15_p9916_Feiguin |
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Citas:
---------- APA ----------
Feiguin, A.E., Arrachea, L. & Aligia, A.A.
(1999)
. Influence of finite hund rules and charge transfer on properties of haldane systems. Physical Review B - Condensed Matter and Materials Physics, 59(15), 9916-9922.
http://dx.doi.org/10.1103/PhysRevB.59.9916---------- CHICAGO ----------
Feiguin, A.E., Arrachea, L., Aligia, A.A.
"Influence of finite hund rules and charge transfer on properties of haldane systems"
. Physical Review B - Condensed Matter and Materials Physics 59, no. 15
(1999) : 9916-9922.
http://dx.doi.org/10.1103/PhysRevB.59.9916---------- MLA ----------
Feiguin, A.E., Arrachea, L., Aligia, A.A.
"Influence of finite hund rules and charge transfer on properties of haldane systems"
. Physical Review B - Condensed Matter and Materials Physics, vol. 59, no. 15, 1999, pp. 9916-9922.
http://dx.doi.org/10.1103/PhysRevB.59.9916---------- VANCOUVER ----------
Feiguin, A.E., Arrachea, L., Aligia, A.A. Influence of finite hund rules and charge transfer on properties of haldane systems. Phys. Rev. B Condens. Matter Mater. Phys. 1999;59(15):9916-9922.
http://dx.doi.org/10.1103/PhysRevB.59.9916
