Unoccupied surface state on Pt(111) revealed by scanning tunneling spectroscopy

Article

关键词: INVERSE-PHOTOEMISSION;    MICROSCOPE;    DENSITY;   

DOI  :  10.1103/PhysRevB.72.193406

来源: SCIE

【 摘 要 】

We measured the dispersion of an unoccupied surface state on Pt(111) by imaging scattering states at point defects and step edges using scanning tunneling spectroscopy. By comparison to first-principles electronic structure calculations the state is assigned to an sp-derived surface band at the lower edge of the projected bulk band gap. In dI/dV(V) curves, the onset of the surface-state band appears as a rather broad feature. Its shape results from two spin-orbit split branches with nearly linear dispersion, one of them merging into bulk states at higher energies.

【 授权许可】

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