Magnetic frustration, short-range correlations and the role of the paramagnetic Fermi surface of PdCrO2.
Magnetic frustration, short-range correlations and the role of the paramagnetic Fermi surface of PdCrO2.
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DOI：
10.1038/srep12428
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发表时间：
2015-07-24
影响因子：
4.6
通讯作者：
Takatsu H
中科院分区：
文献类型：
--
作者：
Billington D;Ernsting D;Millichamp TE;Lester C;Dugdale SB;Kersh D;Duffy JA;Giblin SR;Taylor JW;Manuel P;Khalyavin DD;Takatsu H
挫折的相互作用存在于整个自然界，从蛋白质折叠到挫折的磁性相互作用的例子。虽然在许多电绝缘系统中观察到磁挫折，但在金属中这是一种罕见的现象。巡回传导电子之间的相互作用，调解强自旋轨道耦合的局部磁矩之间的相互作用可能是这些系统的基础。因此，费米面的精确形状和拓扑结构的知识在任何磁行为的解释中都是重要的。PdCrO2，一个挫折的金属磁体，提供了一个机会，研究磁挫折，短程磁序和费米表面拓扑结构之间的关系。通过映射倒易空间中的短程有序和实验确定的电子结构，我们已经确定了Cr电子所发挥的双重作用，其中嵌套的顺磁性费米表面上的巡回调解本地时刻之间的受挫磁相互作用。
Frustrated interactions exist throughout nature, with examples ranging from protein folding through to frustrated magnetic interactions. Whilst magnetic frustration is observed in numerous electrically insulating systems, in metals it is a rare phenomenon. The interplay of itinerant conduction electrons mediating interactions between localised magnetic moments with strong spin-orbit coupling is likely fundamental to these systems. Therefore, knowledge of the precise shape and topology of the Fermi surface is important in any explanation of the magnetic behaviour. PdCrO2, a frustrated metallic magnet, offers the opportunity to examine the relationship between magnetic frustration, short-range magnetic order and Fermi surface topology. By mapping the short-range order in reciprocal space and experimentally determining the electronic structure, we have identified the dual role played by the Cr electrons in which the itinerant ones on the nested paramagnetic Fermi surface mediate the frustrated magnetic interactions between local moments.