Angle-resolved photoemission spectroscopy view on the nature of Ce 4f electrons in the antiferromagnetic Kondo lattice CePd5Al2
Journal article, 2021
We report an angle-resolved photoemission spectroscopy study of the antiferromagnetic Kondo lattice CePd5Al2, focusing on the quasi-two-dimensional k-space nature of its Fermi surface and, tuning photon energy to the Ce 4d-4f on-resonance transition, the hybridization of the Ce 4f state. A strong shoulder feature on the f0 peak was detected, suggesting hybridization between conduction and f bands. On-resonance spectra revealed narrow, yet hybridized quasiparticle bands with sharp peaks and ∼ 9 meV energy dispersion near the Fermi energy EF. The observed dispersive hybridized f band can be well described by a hybridization-band picture based on the periodic Anderson model (PAM). Hence, the 4f electrons in CePd5Al2 display a dual nature, with both localized and itinerant features, but with dominantly localized character.
Author
Ya Hua Yuan
Central South University
Yu Xia Duan
Central South University
Ján Rusz
Uppsala University
Chen Zhang
Central South University
Jiao Jiao Song
Central South University
Qi Yi Wu
Central South University
Yasmine Sassa
Chalmers, Physics, Materials Physics
Uppsala University
Oscar Tjernberg
Royal Institute of Technology (KTH)
Martin Månsson
Royal Institute of Technology (KTH)
Magnus H. Berntsen
Royal Institute of Technology (KTH)
Fan Ying Wu
Central South University
Shu Yu Liu
Central South University
Hao Liu
Central South University
Shuang Xing Zhu
Central South University
Zi Teng Liu
Central South University
Yin Zou Zhao
Central South University
P. H. Tobash
Los Alamos National Laboratory
Eric D. Bauer
Los Alamos National Laboratory
J. D. Thompson
Los Alamos National Laboratory
Peter M. Oppeneer
Uppsala University
Tomasz Durakiewicz
Maria Curie-Sklodowska University
Jian-Qiao Meng
Central South University
Physical Review B
24699950 (ISSN) 24699969 (eISSN)
Vol. 103 12 125122Subject Categories
Astronomy, Astrophysics and Cosmology
Atom and Molecular Physics and Optics
Condensed Matter Physics
DOI
10.1103/PhysRevB.103.125122