论文标题
Fe-Doped NBS $ _2 $的近托效应和旋转玻璃物理的共存
Coexistence of the Kondo effect and spin glass physics in Fe-doped NbS$_2$
论文作者
论文摘要
我们报告了Fe-Doped NBS $ _2 $单晶的近核效应和自旋玻璃行为的共存。 Fe $ _x $ nbs $ _2 $ $ _2 $显示了由于近野效应而导致的电阻最小和负磁性，并且在低温下没有表现出任何超导行为。电阻曲线遵循数值的恢复归一化组理论，使用亲托温度$ t_k = 12.3 $ 〜k，$ x = 0.01 $作为近托效应的证据。扫描隧道显微镜/光谱学（STM/STS）揭示了硫原子附近的Fe原子和不对称光谱。磁敏感性表现出自旋玻璃的特征。由易感性的非线性部分的通用缩放确定的静态临界指数表明三维的海森堡自旋玻璃。 X射线结果揭示的层间和间层中的掺杂FE原子可以实现近托效应和自旋玻璃的共存。
We report the coexistence of the Kondo effect and spin glass behavior in Fe-doped NbS$_2$ single crystals. The Fe$_x$NbS$_2$ shows the resistance minimum and negative magnetoresistance due to the Kondo effect, and exhibits no superconducting behavior at low temperatures. The resistance curve follows a numerical renormalization-group theory using the Kondo temperature $T_K =12.3$~K for $x=0.01$ as evidence of Kondo effect. Scanning tunneling microscope/spectroscopy (STM/STS) revealed the presence of Fe atoms near sulfur atoms and asymmetric spectra. The magnetic susceptibility exhibits a feature of spin glass. The static critical exponents determined by the universal scaling of the nonlinear part of the susceptibility suggest a three-dimensional Heisenberg spin glass. The doped-Fe atoms in the intra- and inter-layers revealed by the X-ray result can realize the coexistence of the Kondo effect and spin glass.
