Orbital-Selective Kondo Entanglement and Antiferromagnetic Order in USb2
Orbital-Selective Kondo Entanglement and Antiferromagnetic Order in USb2
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USb2 中的轨道选择性近藤纠缠和反铁磁序
DOI：
10.1103/physrevlett.123.106402
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发表时间：
2019
影响因子：
8.6
通讯作者：
Tan S Y
中科院分区：
文献类型：
--
作者：
Chen Q Y;Luo X B;Xie D H;Li M L;Ji X Y;Zhou R;Huang Y B;Zhang W;Feng W;Zhang Y;Huang L;Hao Q Q;Liu Q;Zhu X G;Liu Y;Zhang P;Lai X C;Si Q;Tan S Y
在重费米子化合物中，电子的双重特性决定了它们丰富而又奇特的特性，比如易碎的重准粒子、各种磁序和非常规的超导性。-电子锕系物质提供了丰富的背景，以阐明磁序和近藤纠缠之间的竞争，以及更一般地说，相关电子系统中不同相互作用通道之间的相互作用。本文采用角分辨光谱学方法，给出了反铁磁态下的两种不同的近平带的详细电子结构。偏振相关的测量结果表明，这些电子态是由具有不同特征的轨道导出的；此外，进一步的温度相关测量表明，其中一个是由电子和传导电子之间的近藤相关性驱动的，而另一个则反映了磁序的主导作用。我们关于低能电子激发的结果暗示轨道选择性是近藤相关和磁有序之间竞争的一个重要新因素，并由此延伸到强相关电子系统的丰富量子相领域。
In heavy-fermion compounds, the dual character ofelectrons underlies their rich and often exotic properties like fragile heavy quasiparticles, a variety of magnetic orders and unconventional superconductivity.-electron actinide materials provide a rich setting to elucidate the larger and outstanding issue of the competition between magnetic order and Kondo entanglement and, more generally, the interplay among different channels of interactions in correlated electron systems. Here, by using angle-resolved photoemission spectroscopy, we present the detailed electronic structure ofand observe two different kinds of nearly flat bands in the antiferromagnetic state of. Polarization-dependent measurements show that these electronic states are derived fromorbitals with different characters; in addition, further temperature-dependent measurements reveal that one of them is driven by the Kondo correlations between theelectrons and conduction electrons, while the other reflects the dominant role of the magnetic order. Our results on the low-energy electronic excitations ofimplicate orbital selectivity as an important new ingredient for the competition between Kondo correlations and magnetic order and, by extension, in the rich landscape of quantum phases for strongly correlatedelectron systems.