Electronic structure and 4$f$-electron character in Ce2PdIn8 studied by angle-resolved photoemission spectroscopy

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.

doi:10.1103/PhysRevB.99.081107

Title: Electronic structure and 4$$f$$-electron character in Ce₂PdIn₈ studied by angle-resolved photoemission spectroscopy

Journal Article · 05 February 2019 · Physical Review B

DOI: https://doi.org/10.1103/PhysRevB.99.081107 · OSTI ID:1542942

Yao, Q. ^[1]; Kaczorowski, D. ^[2]; Swatek, P. ^[3]; Gnida, D. ^[2]; Wen, C. H. P. ^[4]; Niu, X. H. ^[4]; Peng, R. ^[4]; Xu, H. C. ^[4]; Dudin, P. ^[5]; Kirchner, S. ^[6]; Chen, Q. Y. ^[7]; Shen, D. W. ^[8]; Feng, D. L. ^[9]

Fudan Univ., Shanghai (China); Chinese Academy of Sciences, Shanghai (China)
Polish Academy of Sciences, Wroclaw (Poland)
Polish Academy of Sciences, Wroclaw (Poland); Ames Lab. and Iowa State Univ., Ames, IA (United States)
Fudan Univ., Shanghai (China)
Harwell Science and Innovation Campus, Didcot (United Kingdom)
Zhejiang Univ., Zhejiang (China)
Science and Technology on Surface Physics and Chemistry Lab., Mianyang (China)
Chinese Academy of Sciences, Shanghai (China); CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai (China)
Fudan Univ., Shanghai (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)

The localized-to-itinerant transition of $$f$$ electrons 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 Ce 4$$f$$ electrons in the heavy-fermion superconductor Ce₂PdIn₈, a typical n = 2 Ce_nMmIn_3n+2m compound, using high-resolution and 4$$d$$–4$$f$$ resonant photoemission spectroscopies. The electronic structure of this material has been studied over a wide temperature range, and hybridization between f and conduction electrons can be clearly observed to form a Kondo resonance near the Fermi level at low temperatures. Here, the characteristic temperature of the localized-to-itinerant transition is around 120 K, which is much higher than its coherence temperature T_coh ~ 30K.

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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1542942

Report Number(s):: IS-J--9893

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 8 Vol. 99; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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