Dispersion of a single $4f$ impurity state in photoemission spectra of Yb/W(110)

Details Dispersion of a single $4f$ impurity state in photoemission spectra of Yb/W(110) Dispersion of a single $4f$ impurity state in photoemission spectra of Yb/W(110)

2008-05-20

arxiv.org/abs/0805.3141v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.153404

Angle-resolved photoemission spectra of a monolayer of Yb on W(110) reveal energy splittings and dispersion of the Yb 4f states that are obviously due to their hybridization with W-derived valence bands. These effects occur at well defined points of the surface Brillouin zone although a smearing over reciprocal space is expected from the structural incoherence of the Yb and W lattices. We conclude therefore that dispersion is not related to the periodic arrangement of the $4f$ states but reflects the k-dependent interaction of a single Yb 4f impurity with W bands.

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