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arXiv 1608.02230cond-mat.supr-con
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铁基超导体中的自旋轨道耦合

Spin-orbit coupling in Fe-based superconductors

M. M. Korshunov, Yu. N. Togushova, I. Eremin, P. J. Hirschfeld

摘要:

我们研究了最近发现的铁基超导体中的自旋共振峰。非弹性中子散射实验中观察到的共振峰与扩展$s$波($s_\pm$)带隙对称性的预测结果吻合得很好。最近的中子散射测量表明,有动态自旋磁化率的纵向和横向分量之间的差距。由于自旋轨道耦合,自旋-液相中自旋-旋转不变性的这种破坏可能发生。我们研究了自旋-轨道相互作用在铁磷族化合物多轨道模型中的作用,并展示了它如何影响自旋共振特征。

英文摘要:

We study the spin resonance peak in recently discovered iron-based superconductors. The resonance peak observed in inelastic neutron scattering experiments agrees well with predicted results for the extended $s$-wave ($s_\pm$) gap symmetry. Recent neutron scattering measurements show that there is a disparity between longitudinal and transverse components of the dynamical spin susceptibility. Such breaking of the spin-rotational invariance in the spin-liquid phase can occur due to spin-orbit coupling. We study the role of the spin-orbit interaction in the multiorbital model for Fe-pnictides and show how it affects the spin resonance feature.

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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