Experimental observation of the significant difference between surface and bulk Kondo processes in Kondo lattice YbCu₂Si₂

2023/10/16 by in-Zou Zhao, Zhao, in-Zou, Jiao-Jiao Song +25 · 1 citation
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties of Alloys #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.2310.10216

openalex publication_date 2023/10/16 · openalex created_date 2023/10/18 · openalex updated_date 2026/07/28

Abstract

Synchrotron-based angle-resolved photoemission spectroscopy was employed to investigate the temperature evolution of the Yb 4f spectral for surface and bulk in the Kondo lattice YbCu₂Si₂.Our study quantitatively distinguishes between the surface and bulk hybridization processes, revealing that the onset temperatures for both surface and bulk hybridization processes are significantly higher than the Kondo temperature. Additionally, we found that the effective surface Kondo temperature is much lower than that of the bulk. These findings offer valuable insights into the understanding of heavy fermion physics.

Cited by

• Cleavage-History-Dependent Low-Temperature ARPES Spectra of Charge-Ordered EuAl₄

Related

• Optical evidence of local and itinerant states in Ce- and Yb-heavy-fermion compounds
• Thermopower evolution in Yb(Rh_1-xCo_x)₂Si₂
• Kondo exhaustion and conductive surface states in antiferromagnetic YbIr₃Si₇
• Fermi surface collapse and energy scales in Ce2RhIn8
• Different Evolution of Intrinsic Gap in Kondo Semiconductors SmB6 and YbB12