Hybridization Effects in CeCoIn\ (₅\) Studied by Angle-resolved Photoemission Spectroscopy

Key Points

• This study aims to explore the electronic structure of the heavy fermion superconductor CeCoIn5 using angle-resolved photoemission spectroscopy.
• Conducted angle-resolved photoelectron spectroscopy (ARPES) on CeCoIn5
• Examined spectral weight distribution across the Fermi surface map at low temperatures (< 6 K)
• Analyzed coupling effects between 4f states and conduction bands near the Fermi level.
• Observed non-uniform distribution of 4f-derived spectral weight across the Fermi surface
• Noted rapid changes in band slope and increasing 4f contribution near the Fermi level
• Identified presence of heavy quasiparticle bands with effective mass approximately 100 times that of an electron.