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Vibronic Interaction in Tetrameric Clusters with Two-Electron Transfer: Magnetic Properties

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The influence of vibronic interactions on the magnetic properties of the tetrameric square-planar mixed-valence d0-d0-d1-d1 cluster with two-electron transfer is investigated. The dynamic vibronic problem has been solved taking into account the Heisenberg and double exchange. It was shown that the double exchange and vibronic coupling leads to two types of pseudo-Jahn-Teller problems: (1An1+1Ad1+1B1+1B2+1E) ⊗ (b2+e) and (3B2+3A2+3En+3Ed) ⊗ (b2+e). The dependence of magnetic properties on vibronic interaction was studied. All peculiarities of magnetic moments take place in the case of intermediate vibronic coupling. The results show that the vibronic interaction essentially affects the magnetic properties of the system, such as for the tetrameric tetrahedral cluster with one extra electron.
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Keywords: HEISENBERG AND DOUBLE EXCHANGE; MAGNETIC MOMENT; MIXED-VALENCE; VIBRONIC INTERACTION

Document Type: Research Article

Publication date: 2009-04-01

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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