  The three-dimensional electronic structure and Ce 4f electrons of the heavy
fermion superconductor CePt2In7 is investigated. Angle-resolved photoemission
spectroscopy using variable photon energy establishes the existence of
quasi-two and three dimensional Fermi surface topologies. Temperature-dependent
4d-4f on-resonance photoemission spectroscopies reveal that heavy quasiparticle
bands begin to form at a temperature well above the characteristic (coherence)
temperature T*. T* emergence may be closely related to crystal electric field
splitting, particularly the low-lying heavy band formed by crystal electric
field splitting.
