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Weak ferromagnetism accompanying loop current order in underdoped cuprate superconductors

机译:掺杂不足的铜酸盐超导体中的弱铁磁伴随回路电流顺序

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摘要

We discuss the necessary symmetry conditions and the different ways in which they can be physically realized for the occurrence of ferromagnetism accompanying the loop current orbital magnetic order observed by polarized neutron-diffraction experiments (or indeed any other conceivable principal order) in the under-doped phase of cuprates. We contrast the Kerr effect experiments in single crystals observing ferromagnetism with the direct magnetization measurements in large powder samples, which do not observe it. We also suggest experiments to resolve the differences among the experiments, all of which we believe to be correct.
机译:我们讨论了必要的对称条件,以及在低掺杂状态下伴随极化电流中子衍射实验观察到的环路电流轨道磁阶(或实际上任何其他可能的主阶)伴随着环电流轨道磁阶发生的铁磁性发生的必要对称性条件和不同实现方式。铜酸盐阶段。我们将观察铁磁性的单晶中的Kerr效应实验与未观察到的大粉末样品中的直接磁化测量结果进行对比。我们还建议通过实验来解决实验之间的差异,我们认为所有这些都是正确的。

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