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首页> 外文期刊>Physical review >Competition between vanadium tetramerization and trimerization in Ba_(1-x)Sr_xV_(13)O_(18)
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Competition between vanadium tetramerization and trimerization in Ba_(1-x)Sr_xV_(13)O_(18)

机译:Ba_(1-x)Sr_xV_(13)O_(18)中钒四聚和三聚之间的竞争

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摘要

We studied the transport, magnetic, and structural properties of Ba_(1-x)Sr_xV_(13)O_(18), in which V and O ions form a sodium-chloride lattice with periodically missing sites. We found that the high-temperature insulating phase is characterized by spin-singlet V tetramers, whereas the low-temperature conducting phase is characterized by V trimers, and these two phases are competing in this series of compounds. Various properties substantially change at the phase transition between the two, indicating a drastic reconstruction of the electronic structure.
机译:我们研究了Ba_(1-x)Sr_xV_(13)O_(18)的输运,磁性和结构性质,其中V和O离子形成具有周期性缺失位点的氯化钠晶格。我们发现高温绝缘相的特征是自旋单峰V四聚体,而低温导电相的特征在于V三聚体,并且这两个相在这一系列化合物中竞争。各种性质在两者之间的相变处实质上改变,表明电子结构的急剧重建。

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