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 signif-icantly 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.
基金项目
国家自然科学基金(12074436)
国家重点研发计划(2022YFA1604204)
Science and Technology Innovation Program of Hunan Province(2022RC3068)
High Performance Computing Center of Central South University()
万方数据