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arXiv 0710.3025cond-mat.str-el
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阻挫团簇中集体自旋的形成

Formation of collective spins in frustrated clusters

Julien Robert, Virginie Simonet, Benjamin Canals, Rafik Ballou, Elsa Lhotel, Céline Darie, Pierre Bordet, Bachir Ouladdiaf, Marc Johnson, Jacques Ollivier, Dani… 展开作者

Julien Robert, Virginie Simonet, Benjamin Canals, Rafik Ballou, Elsa Lhotel, Céline Darie, Pierre Bordet, Bachir Ouladdiaf, Marc Johnson, Jacques Ollivier, Daniel Braithwaite, Harison Rakoto, Sophie De Brion

摘要:

使用磁化强度,比热和中子散射测量,以及精确计算的现实模型,磁性能的\lacuvo化合物的特点是在很宽的温度范围内。在高温下,这种氧化物被很好地描述为强关联原子$S$ =1/2自旋,而降低温度时,它切换到一组弱相互作用和随机分布的纠缠赝自旋$\tilde S=1/2$和$\tilde S=0$。这些赝自旋是建立在阻挫簇上的,类似于kagomé积木,在三角形超晶格的顶点,几何阻挫以不同的尺度介入。

英文摘要:

Using magnetization, specific heat and neutron scattering measurements, as well as exact calculations on realistic models, the magnetic properties of the \lacuvo compound are characterized on a wide temperature range. At high temperature, this oxide is well described by strongly correlated atomic $S$=1/2 spins while decreasing the temperature it switches to a set of weakly interacting and randomly distributed entangled pseudo spins $\tilde S=1/2$ and $\tilde S=0$. These pseudo-spins are built over frustrated clusters, similar to the kagomé building block, at the vertices of a triangular superlattice, the geometrical frustration intervening then at different scales.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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