Electronic structure of heavy fermion system CePt_2In_7 from angle-resolved photoemission spectroscopy

We have carried out high-resolution angle-resolved photoemission measurements on the Ce-based heavy fermion compound CePt_2In_7 that exhibits stronger two-dimensional character than the prototypical heavy fermion system CeCoIn_5.Multiple Fermi surface sheets and a complex band structure are clearly...

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Veröffentlicht in:中国物理B:英文版 2017, Vol.26 (7), p.352-362
1. Verfasser: 沈兵 俞理 刘凯 吕守鹏 贾小文 E D Bauer J D Thompson 张艳 王晨露 胡成 丁颖 孙璇 胡勇 刘静 高强 赵林 刘国东 许祖彦 陈创天 卢仲毅 周兴江
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Sprache:eng
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Zusammenfassung:We have carried out high-resolution angle-resolved photoemission measurements on the Ce-based heavy fermion compound CePt_2In_7 that exhibits stronger two-dimensional character than the prototypical heavy fermion system CeCoIn_5.Multiple Fermi surface sheets and a complex band structure are clearly resolved. We have also performed detailed band structure calculations on CePt_2In_7. The good agreement found between our measurements and the calculations suggests that the band renormalization effect is rather weak in CePt_2In_7. A comparison of the common features of the electronic structure of CePt_2In_7 and CeCoIn_5 indicates that CeCoIn_5 shows a much stronger band renormalization effect than CePt_2In_7. These results provide new information for understanding the heavy fermion behaviors and unconventional superconductivity in Ce-based heavy fermion systems.
ISSN:1674-1056
2058-3834