$\ensuremath{\pi}$ Resonance of Chemisorbed Alkali Atoms on Noble Metals

$π$ Resonance of Chemisorbed Alkali Atoms on Noble Metals

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, and H. Petek

Phys. Rev. Lett. 101, 266801 – Published 22 December 2008

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 $σ$ resonance oriented along the surface normal, there exist long-lived alkali-localized resonances oriented parallel to the surface ( $π$ 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.

Received 14 July 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.266801

Authors & Affiliations

A. G. Borisov^1,*, V. Sametoglu², A. Winkelmann^2,3, A. Kubo^2,4, N. Pontius^2,5, J. Zhao², V. M. Silkin^6,7, J. P. Gauyacq¹, E. V. Chulkov^6,7, P. M. Echenique^6,7, and H. Petek^2,6

¹Laboratoire des Collisions Atomiques et Moléculaires, UMR CNRS-Université Paris-Sud 8625, Bâtiment 351, Université Paris-Sud, 91405 Orsay CEDEX, France
²Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
³Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
⁴PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama, Japan
⁵BESSY mbh, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
⁶Donostia International Physics Center DIPC, P. Manuel de Lardizabal 4, San Sebastián 20018, Spain
⁷Centro de Física de Materiales CSIC-UPV/EHU and Departamento de Física de Materiales UPV/EHU, Facultad de Química, Aptd. 1072, San Sebastián E-20080, Spain

^*Corresponding author. andrei.borissov@u-psud.fr

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 101, Iss. 26 — 31 December 2008

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters

π Resonance of Chemisorbed Alkali Atoms on Noble Metals

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, and H. Petek

Phys. Rev. Lett. 101, 266801 – Published 22 December 2008

Abstract

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Figure 1

Figure 2

Figure 3

Figure 4

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

$π$ Resonance of Chemisorbed Alkali Atoms on Noble Metals