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Low-temperature ultrahigh-resolution photoemission ͑PE͒ spectroscopy of the recently discovered binary icosahedral ͑i͒ Cd 5.7 Yb and its 1/1-cubic approximant Cd 6 Yb has commonly revealed a sharp Fermi edge with a marked spectral intensity decrease towards the Fermi level (E F), indicating the presence of a dip near E F which is consistent with the recent result of electronic structure calculations ͓Y. Ishii and T. Fujiwara, Phys. Rev. Lett. 87, 206408 ͑2001͔͒, and the dip at E F is found to be much deeper in i-Cd 5.7 Yb than in 1/1-Cd 6 Yb. Moreover, surface core-level shifts ͑SCS's͒ are clearly observed in the quasicrystal and the approximant, and the SCS's are found to be substantially different between these two compounds of different long-range orders.

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