Artículo
Four-spin cyclic exchange in spin ladder cuprates
Autor/es | Jiménez Calzado, Carmen
Graaf, Coen de Bordas, Esther Caballol, Rosa Malrieu, J.P. |
Departamento | Universidad de Sevilla. Departamento de Química Física |
Fecha de publicación | 2003 |
Fecha de depósito | 2016-10-26 |
Publicado en |
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Resumen | The four-spin cyclic exchange term Jring of three spin-ladder cuprates (SrCu2O3, Sr2Cu3O5, and CaCu2O3) has been calculated from ab initio quantum chemistry calculations. For the first two compounds, a non-negligible cyclic ... The four-spin cyclic exchange term Jring of three spin-ladder cuprates (SrCu2O3, Sr2Cu3O5, and CaCu2O3) has been calculated from ab initio quantum chemistry calculations. For the first two compounds, a non-negligible cyclic exchange is found, aproximately 20% of the magnetic coupling across the rungs, J⊥, and always larger than the value obtained for two-dimensional La2CuO4 system. In the case of CaCu2O3, the Jring value is quite small, due to the folding of the Cu-O-Cu rung angle, but the Jring/J⊥ ratio is also 0.2 as in the two other systems |
Cita | Jiménez Calzado, C., Graaf, C.d., Bordas, E., Caballol, . y Malrieu, J.P. (2003). Four-spin cyclic exchange in spin ladder cuprates. Physical Review B - Condensed Matter and Materials Physics, 67 (13), 1324091-1324094. |
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