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Borisov AG, Sametoglu V, Winkelmann A, et al. Pi resonance of chemisorbed alkali atoms on noble metals. Phys Rev Lett. 2008;101(26):266801doi: 10.1103/PhysRevLett.101.266801.
Borisov, A. G., Sametoglu, V., Winkelmann, A., Kubo, A., Pontius, N., Zhao, J., Silkin, V. M., Gauyacq, J. P., Chulkov, E. V., Echenique, P. M., & Petek, H. (2008). Pi resonance of chemisorbed alkali atoms on noble metals. Physical review letters, 101(26), 266801. https://doi.org/10.1103/PhysRevLett.101.266801
Borisov, A G, et al. "Pi resonance of chemisorbed alkali atoms on noble metals." Physical review letters vol. 101,26 (2008): 266801. doi: https://doi.org/10.1103/PhysRevLett.101.266801
Borisov AG, Sametoglu V, Winkelmann A, Kubo A, Pontius N, Zhao J, Silkin VM, Gauyacq JP, Chulkov EV, Echenique PM, Petek H. Pi resonance of chemisorbed alkali atoms on noble metals. Phys Rev Lett. 2008 Dec 31;101(26):266801. doi: 10.1103/PhysRevLett.101.266801. PMID: 19113781.
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Phys Rev Lett. 2008 Dec 31;101(26):266801. doi: 10.1103/PhysRevLett.101.266801.

Pi resonance of chemisorbed alkali atoms on noble metals.

Physical review letters

A G Borisov, V Sametoglu, A Winkelmann, A Kubo, N Pontius, J Zhao, V M Silkin, J P Gauyacq, E V Chulkov, P M Echenique, H Petek

Affiliations

  1. Laboratoire des Collisions Atomiques et Moléculaires, UMR CNRS-Universite Paris-Sud 8625, Bâtiment 351, Université Paris-Sud, 91405 Orsay cedex, France. [email protected]

PMID: 19113781 DOI: 10.1103/PhysRevLett.101.266801

Abstract

We have performed a joint experimental and theoretical study of the unoccupied electronic structure of alkali adsorbates on the (111) surfaces of Cu and Ag. Combining angle- and time-resolved two-photon photoemission spectroscopy with wave packet propagation calculations we show that, along with the well known sigma resonance oriented along the surface normal, there exist long-lived alkali-localized resonances oriented parallel to the surface (pi symmetry). These new resonances are stabilized by the projected band gap of the substrate and emerge primarily from the mixing of the p and d Rydberg orbitals of the free alkali atom modified by the interaction with the surface.

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