| HAL : hal-00084020, version 1 |
| arXiv : cond-mat/0607108 |
| DOI : 10.1103/PhysRevB.73.212409 |
| Fiche détaillée | Récupérer au format |
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| Physical Review B 73 (2006) 212409 |
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| Exchange integrals and magnetization distribution in BaCu2X2O7 (X=Ge,Si) |
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| Sylvain Bertaina 1, 2Roland Hayn 1 |
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| (2006) |
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| Estimating the intrachain and interchain exchange constants in BaCu2X2O7 (X=Ge,Si) by means of density-functional calculations within the local spin-density approximation (LSDA) we find the Ge compound to be a more ideal realization of a one-dimensional spin chain with Dzyaloshinskii-Moriya interaction than its Si counterpart. Both compounds have a comparable magnitude of interchain couplings in the range of 5-10 K , but the nearest neighbor intrachain exchange of the Ge compound is nearly twice as large as for the Si one. Using the LSDA+U method we predict the detailed magnetization density distribution and especially remarkable magnetic moments at the oxygen sites. |
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| 1 : | Laboratoire matériaux et microélectronique de Provence (L2MP) |
| CNRS : UMR6137 – Université Paul Cézanne - Aix-Marseille III – Université de Provence - Aix-Marseille I – Université Sud Toulon Var | |
| 2 : | Laboratoire Louis Néel (LLN) |
| CNRS : UPR5051 | |
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| Domaine | : | Physique/Matière Condensée/Electrons fortement corrélés |
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| ab initio – fplo – lsda – copper oxyde – quantum spin chain |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00084020, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00084020 | |
| oai:hal.archives-ouvertes.fr:hal-00084020 | |
| Contributeur : Sylvain Bertaina | |
| Soumis le : Mercredi 5 Juillet 2006, 13:33:59 | |
| Dernière modification le : Mercredi 5 Juillet 2006, 14:17:18 | |