Electronic structure and 4f-electron character in Ce2PdIn8 studied by angle-resolved photoemission spectroscopy
Electronic structure and 4f-electron character in Ce2PdIn8 studied by angle-resolved photoemission spectroscopy
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角分辨光电子能谱研究 Ce2PdIn8 的电子结构和 4f 电子特征
DOI：
10.1103/physrevb.99.081107
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发表时间：
2019
影响因子：
3.7
通讯作者：
Feng D L
中科院分区：
文献类型：
--
作者：
Yao Q;Kaczorowski D;Swatek P;Gnida D;Wen C H P;Niu X H;Peng R;Xu H C;Dudin P;Kirchner S;Chen Q Y;Shen D W;Feng D L
电子的局域到流动跃迁是重费米子物理学的核心，但只在单层ce基材料中被直接观察到。在这里，我们报告了一个全面的研究在重费米子超导体的电子结构和性质，一个典型的化合物，使用高分辨率和共振光电发射光谱。在较宽的温度范围内研究了这种材料的电子结构，并且可以清楚地观察到导电电子之间的杂化，在低温下在费米能级附近形成近藤共振。局域向流动转变的特征温度约为120k，远高于相干温度。
The localized-to-itinerant transition ofelectrons lies at the heart of heavy-fermion physics, but has only been directly observed in single-layer Ce-based materials. Here, we report a comprehensive study on the electronic structure and nature of the Ceelectrons in the heavy-fermion superconductor, a typicalcompound, using high-resolution andresonant photoemission spectroscopies. The electronic structure of this material has been studied over a wide temperature range, and hybridization betweenand conduction electrons can be clearly observed to form a Kondo resonance near the Fermi level at low temperatures. The characteristic temperature of the localized-to-itinerant transition is around 120 K, which is much higher than its coherence temperature.