论文标题
用4F1和4F2配置，重型费米恩填充的Skutterudites中不同的近野筛选行为
Distinct Kondo Screening Behaviors in Heavy Fermion Filled Skutterudites with 4f1 and 4f2 Configurations
论文作者
论文摘要
填充的 - 孔曲霉重型费米（HF）化合物寄主富含的基态，具体取决于F电子构型。具有CE 4F1的CeOS4SB12（COS）和带有PR 4F2构型的PROS4SB12（POS）显示了近托绝缘和HF超导性的独特特性，相应性。我们通过角度分辨光光谱研究揭示了潜在的显微镜起源。它们的EV尺度谱带结构很好地匹配，代表ROS4SB12系统中传导电子的共同特征（R =稀土）。但是，F电子与其中的传导电子相互作用。在具有带依赖的杂交间隙的COS中观察到传导电子和F电子之间的强杂交，并且直接揭示了近托绝缘态的发展。尽管POS的基态是由于热激发三重激动的三重晶体晶体电场（CEF）状态而存在的单线，但有限但不连贯的杂交。我们的结果有助于理解COS和POS中有趣的特性，并为具有4F1和4F2配置的HF系统中的微观差异提供了清晰的证明。
Filled-skutterudite heavy fermion (HF) compounds host rich ground states depending on the f electron configurations. CeOs4Sb12 (COS) with Ce 4f1, and PrOs4Sb12 (POS) with Pr 4f2 configurations show distinct properties of Kondo insulating and HF superconductivity, respectivity. We unveiled the underlying microscopic origin by angle-resolved photoemission spectroscopy studies. Their eV-scale band structure matches well, representing the common characters of conduction electrons in ROs4Sb12 systems (R = rare earth). However, f electrons interact differently with conduction electrons in them. Strong hybridization between conduction electrons and f electrons is observed in COS with band dependent hybridization gaps, and the development of Kondo insulating state is directly revealed. Although the ground state of POS is a singlet, finite but incoherent hybridization exists due to Kondo scattering with the thermally excited triplet crystalline electric field (CEF) state. Our results help to understand the intriguing properties in COS and POS, and provide a clean demonstration of the microscopic differences in HF systems with 4f1 and 4f2 configurations.
