Frustration-induced diffusive scattering anomaly and dimension change in FeGe2
Frustration-induced diffusive scattering anomaly and dimension change in FeGe2
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FeGe2 中挫败引起的扩散散射异常和尺寸变化
DOI：
10.1103/physrevb.106.024406
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发表时间：
2022
影响因子：
3.7
通讯作者：
Li, Chen
中科院分区：
文献类型：
--
作者：
Su, Yaokun;Smith, Hillary L.;Stone, Matthew B.;Abernathy, Douglas L.;Lumsden, Mark D.;Adams, Carl P.;Li, Chen
由于与材料中奇异的量子现象有关，交换相互作用的竞争引起了人们的极大关注。在目前的工作中，我们报告了一个不寻常的棋盘状散射异常，远离已知的无公度磁卫星峰，是由非弹性中子散射引起的。更令人惊讶的是，这种现象在低温下表现为自旋动力学，但在奈尔相变上表现为弹性散射。提出了一个包含面内次近邻的模型哈密顿量，这种反常现象归因于准一维空间中的近乎完美的磁受挫和意外的二维磁序的出现。
Magnetic frustration, arising from the competition of exchange interactions, has received great attention because of its relevance to exotic quantum phenomena in materials. In the current work, we report an unusual checkerboard-shaped scattering anomaly in, far from the known incommensurate magnetic satellite peaks, by inelastic neutron scattering. More surprisingly, such phenomenon appears as spin dynamics at low temperature, but it becomes prominent above Néel transition as elastic scattering. A model Hamiltonian that includes an intraplane next-nearest neighbor was proposed and such anomaly is attributed to the near-perfect magnetic frustration and the emergence of unexpected two-dimensional magnetic order in the quasi-one-dimensional.