Three-dimensional and temperature-dependent electronic structure of the heavy-fermion compound CePt2In7 studied by angle-resolved photoemission spectroscopy
Three-dimensional and temperature-dependent electronic structure of the heavy-fermion compound CePt2In7 studied by angle-resolved photoemission spectroscopy
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利用角分辨光电子能谱研究重费米子化合物 CePt2In7 的三维温度依赖性电子结构
DOI：
10.1103/physrevb.101.115129
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发表时间：
2020
影响因子：
3.7
通讯作者：
Yu-Xia Duan
中科院分区：
文献类型：
--
作者：
Yang Luo;Cheng Zhang;Qi-Yi Wu;Fan-Ying Wu;Jiao-jiao Song;Wei Xia;Yanfeng Guo;Jan Rusz;Peter M. Oppeneer;Tomasz Durakiewicz;Yin-zou Zhao;Hao Liu;Shuang-Xing Zhu;Ya-Hua Yuan;Xiao-Fang Tang;Jun He;Shi-Yong Tan;Y. B. Huang;Zhe Sun;Yi Liu;H. H. Liu;Yu-Xia Duan
研究了重费米子超导体CePt_2 In_7的三维电子结构和温度相关的电子结构。角分辨光电子能谱使用可变光子能量建立准二维和三维费米表面拓扑结构的存在。依赖于温度的4d-4f共振光电子能谱数据表明，重准粒子带开始形成的温度远高于特征（相干）温度T+。在重费米子化合物中，低场晶体电场激发的出现可能是重电子相干的“再定域”或建立的前兆。这些发现为理解重费米子系统中的杂交提供了重要的见解。
The three-dimensional and temperature-dependent electronic structures of the heavy-fermion superconductor CePt2In7 are investigated. Angle-resolved photoemission spectroscopy using variable photon energy establishes the existence of quasi-two- and three-dimensional Fermi surface topologies. Temperature-dependent 4d-4f on-resonance photoemission spectroscopies data reveal that heavy quasiparticle bands begin to form at a temperature well above the characteristic (coherence) temperature T+. The emergence of low-lying crystal electric field excitation may be responsible for the "relocalization" or the precursor to the establishment of heavy electrons coherence in heavy-fermion compounds. These findings provide critical insight into understanding the hybridization in heavy-fermion systems.