9:45 AM - 10:00 AM
[1Ca04Y] Observation of structure and electronic states of a single-layer Kondo lattice CePt6/Pt(111)
We grew 1 unit layer (u.l.) of a Ce-Pt intermetallic compound on Pt(111) and observed the structure and the electronic states using scanning tunneling microscopy/spectroscopy. Atomically resolved observation revealed the formation of an ordered (2×2)-CePt6/Pt(111) with a pure Pt atomic layer at the surface. By measuring quasiparticle interference at 5 K, we found that the surface state on Pt(111) above Fermi energy shifts downward on the topmost Pt layer of the 1 u.l. CePt6, indicating charge transfer from the underneath CePt2 layer. The observed zero-bias anomaly in the tunneling spectra suggests a coherent Kondo state.