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arXiv · 1910.10907

Angle-resolved photoemission spectroscopy study of crystal electric field in heavy fermion compound CePt2In7

Yang Luo·Chen Zhang·Qi-Yi Wu·Fan-Ying Wu·Jiao-Jiao Song·W. Xia·Yanfeng Guo·Jan Rusz·Peter M. Oppeneer·Tomasz Durakiewicz·Yin-Zou Zhao·Hao Liu·Shuang-Xing Zhu·Ya-Hua Yuan·Jun He·Shi-Yong Tan·Y. B. Huang·Zhe Sun·Yi Liu·H. Y. Liu·Yu-Xia Duan·Jian-Qiao Meng
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Abstract

The three-dimensional electronic structure and Ce 4f electrons of the heavy fermion superconductor CePt2In7 is 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 reveal that heavy quasiparticle bands begin to form at a temperature well above the characteristic (coherence) temperature T*. T* emergence may be closely related to crystal electric field splitting, particularly the low-lying heavy band formed by crystal electric field splitting.

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Yang Luo, Chen Zhang, Qi-Yi Wu, Fan-Ying Wu, Jiao-Jiao Song, W. Xia, Yanfeng Guo, Jan Rusz, Peter M. Oppeneer, Tomasz Durakiewicz, Yin-Zou Zhao, Hao Liu, Shuang-Xing Zhu, Ya-Hua Yuan, Jun He, Shi-Yong Tan, Y. B. Huang, Zhe Sun, Yi Liu, H. Y. Liu, Yu-Xia Duan, Jian-Qiao Meng. 2019-10-24. Angle-resolved photoemission spectroscopy study of crystal electric field in heavy fermion compound CePt2In7. https://doi.org/10.1103/physrevb.101.115129

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