Publication
Physical Review B
Paper

Unoccupied electronic band structure of Na on Cu(111) as studied by inverse photoemission

View publication

Abstract

We have determined the unoccupied part of the electronic structure of sodium on Cu(111), employing k-resolved inverse photoemission in the isochromat mode. For Na coverages above 0.15 monolayer, an image-potential surface state is observed 2.3 eV above EF. For the completed p(2×2) Na phase at 0.25-monolayer coverage, a pronounced Na 3pz derived feature occurs 0.4 eV above EF, which exhibits a nearly-free-electron-like energy dispersion. For wave vectors k 0.6 A-1, the unoccupied part of the Na 3s band appears close to the Fermi level. We compare our results with recent band-structure calculations for free and adsorbed Na monolayers. © 1991 The American Physical Society.

Date

15 Jul 1991

Publication

Physical Review B

Authors

Topics

Share