论文标题
FESE沮丧的磁相互作用
Frustrated magnetic interactions in FeSe
论文作者
论文摘要
结构上最简单的高温超导体FESE表现出一种有趣的超导列磁磁相，具有与典型的自旋波的不同寻常的自旋激发光谱。因此，确定其有效的磁交换相互作用是具有挑战性的。在这里，我们报告了四方顺磁相中FESE自旋波动的中子散射测量。 We show that the equal-time magnetic structure factor, $\mathcal{S}(\textbf{Q})$, can be effectively modeled using the self-consistent Gaussian approximation calculation with highly frustrated nearest-neighbor ($J_{1}$) and next-nearest-neighbor ($J_{2}$) exchange couplings, and very weak further neighbor exchange interaction.我们的结果阐明了FESE中令人沮丧的磁性，这为FESE和相关材料中高度可调的超导性和非神经性提供了自然的解释。
The structurally simplest high-temperature superconductor FeSe exhibits an intriguing superconducting nematic paramagnetic phase with unusual spin excitation spectra that are different from typical spin waves; thus, determining its effective magnetic exchange interactions is challenging. Here we report neutron scattering measurements of spin fluctuations of FeSe in the tetragonal paramagnetic phase. We show that the equal-time magnetic structure factor, $\mathcal{S}(\textbf{Q})$, can be effectively modeled using the self-consistent Gaussian approximation calculation with highly frustrated nearest-neighbor ($J_{1}$) and next-nearest-neighbor ($J_{2}$) exchange couplings, and very weak further neighbor exchange interaction. Our results elucidate the frustrated magnetism in FeSe, which provides a natural explanation for the highly tunable superconductivity and nematicity in FeSe and related materials.
