论文标题
在几何沮丧的pr $ _ {2} $ ir $ _ {2} $ o $ $ $ _ {7} $
Inhomogeneous Kondo-lattice in geometrically frustrated Pr$_{2}$Ir$_{2}$O$_{7}$
论文作者
论文摘要
局部IR旋转的几何挫折引起的磁波动会干扰pyrochlore iridates家族中的远程磁顺序的形成，r $ _ {2} $ ir $ $ $ _ {2} $ o $ $ $ $ _ {7} $（r = lanthanide）$^{1} $。 As a consequence, Pr$_{2}$Ir$_{2}$O$_{7}$ lies at a tuning-free antiferromagnetic-to-paramagnetic quantum critical point and exhibits a diverse array of complex phenomena including Kondo effect, biquadratic band structure, metallic spin-liquid (MSL), and anomalous Hall effect$^{2-5}$.使用扫描隧道显微镜进行光谱成像，并与机器学习K-Means聚集分析，密度功能理论和理论建模相辅相成，我们探究了PR $ _ {2} $ _ {2} $ ir $ $ $ $ $ _ {2} $ $ $ $ $ $ $ $ $ $ _ {7} $的单个晶体中的本地电子状态。具有明确定义的近托共振的纳米级区域与非磁性金属相与昆多毁灭相互交织。值得注意的是，空间纳米级模式显示了相关驱动的分形几何形状，而幂律行为延伸了两年半，这与与临界点的距离保持一致。我们的发现揭示了一条新的纳米级调整路线，即。利用电子电位的空间变化作为调整近代纠缠与几何挫败感之间平衡的手段。
Magnetic fluctuations induced by geometric frustration of local Ir-spins disturb the formation of long range magnetic order in the family of pyrochlore iridates, R$_{2}$Ir$_{2}$O$_{7}$ (R = lanthanide)$^{1}$. As a consequence, Pr$_{2}$Ir$_{2}$O$_{7}$ lies at a tuning-free antiferromagnetic-to-paramagnetic quantum critical point and exhibits a diverse array of complex phenomena including Kondo effect, biquadratic band structure, metallic spin-liquid (MSL), and anomalous Hall effect$^{2-5}$. Using spectroscopic imaging with the scanning tunneling microscope, complemented with machine learning K-means clustering analysis, density functional theory, and theoretical modeling, we probe the local electronic states in single crystal of Pr$_{2}$Ir$_{2}$O$_{7}$ and discover an electronic phase separation. Nanoscale regions with a well-defined Kondo resonance are interweaved with a non-magnetic metallic phase with Kondo-destruction. Remarkably, the spatial nanoscale patterns display a correlation-driven fractal geometry with power-law behavior extended over two and a half decades, consistent with being in proximity to a critical point. Our discovery reveals a new nanoscale tuning route, viz. using a spatial variation of the electronic potential as a means of adjusting the balance between Kondo entanglement and geometric frustration.
