Influence of finite hund rules and charge transfer on properties of haldane systems
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 orde...
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Formato: | Capítulo de libro |
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1999
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Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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001 | PAPER-16546 | ||
003 | AR-BaUEN | ||
005 | 20250313084436.0 | ||
008 | 190411s1999 xx ||||fo|||| 00| 0 eng|d | ||
024 | 7 | |2 scopus |a 2-s2.0-16444383097 | |
040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
100 | 1 | |a Feiguin, Adrián Esteban | |
245 | 1 | 0 | |a Influence of finite hund rules and charge transfer on properties of haldane systems |
260 | |c 1999 | ||
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506 | |2 openaire |e Política editorial | ||
520 | 3 | |a 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. |l eng | |
593 | |a Instituto de Física Rosario (CONICET-UNR), Rosario, 2000, Argentina | ||
593 | |a PUC-Rio, Departamento de Fisica, Caixa Postal 38071, Cep, Rio de Janeiro, RJ, 22452-970, Brazil | ||
593 | |a Depto. De Física, Universidad Nacional de Buenos Aires, Pabellon I, Ciudad Universitaria (1428), Buenos Aires, Argentina | ||
593 | |a Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, Bariloche, 8400, Argentina | ||
700 | 1 | |a Arrachea, Liliana del Carmen | |
700 | 1 | |a Aligia, Armando Angel | |
773 | 0 | |d 1999 |g v. 59 |h pp. 9916-9922 |k n. 15 |p Phys. Rev. B Condens. Matter Mater. Phys. |x 10980121 |t Physical Review B - Condensed Matter and Materials Physics | |
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