论文标题
van der waals feromagnet fe3-xgete2
Antiferromagnetic fluctuations and orbital-selective Mott transition in the van der Waals ferromagnet Fe3-xGeTe2
论文作者
论文摘要
Fe3-Xgete2是基础研究和应用研究的分层磁性范德华材料。尽管观察到了有趣的物理特性，但即使在与磁性有关的基本特征上也存在开放问题：它是简单的铁磁磁铁还是存在抗铁磁磁性制度，并且是本地或巡回赛的时刻。在这里，我们证明，抗磁性自旋波动通过全面的弹性和无弹性中子散射和热力学测量与铁磁磁性共存。我们现实的动态平均场理论计算表明，竞争磁波动是由轨道选择性莫特过渡驱动的，其中只有Fe（3D）歧管的Fe（3D）歧管的平面 - 垂直A1g轨道仍保持静止。我们的结果突出了Fe3-Xgete2中的多轨性特征，该特征支持该材料中局部和巡回物理的罕见共存。
Fe3-xGeTe2 is a layered magnetic van der Waals material of interest for both fundamental and applied research. Despite the observation of intriguing physical properties, open questions exist even on the basic features related to magnetism: is it a simple ferromagnet or are there antiferromagnetic regimes and are the moments local or itinerant. Here, we demonstrate that antiferromagnetic spin fluctuations coexist with the ferromagnetism through comprehensive elastic and inelastic neutron scattering and thermodynamic measurements. Our realistic dynamical mean-field theory calculations reveal that the competing magnetic fluctuations are driven by an orbital selective Mott transition, where only the plane-perpendicular a1g orbital of the Fe(3d) manifold remains itinerant. Our results highlight the multi-orbital character in Fe3-xGeTe2 that supports a rare coexistence of local and itinerant physics within this material.
