Phys. Rev. B 68, 195422 (2003) [10 pages]Hole dynamics in a quantum-well state at Na/Cu(111)
E. V. Chulkov1,2, J. Kliewer3, R. Berndt3, V. M. Silkin1, B. Hellsing4, S. Crampin5, and P. M. Echenique1,2 Received 15 April 2003; published 26 November 2003 Theoretical calculations and scanning-tunneling spectroscopy measurements of the hole lifetime broadening, τ-1, in a quantum-well state for 0.95 and 1.0 monolayers of Na on Cu(111) are reported. A model potential is proposed for calculating quantum-well states in a monolayer on metal surfaces. The inelastic electron-electron contribution, τe-e-1, is evaluated within the GW approximation by using eigenfunctions and eigenenergies obtained with this model potential. The electron-phonon contribution, τe-ph-1, is computed by employing Debye and Einstein models as well as a first-principle ultrasoft pseudopotential method. The obtained theoretical results are in excellent agreement with experimental data, both showing a surprisingly large difference in the lifetime broadening for 0.95 and 1.0 monolayers which is attributed mostly to changes in the electronic structure. ©2003 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevB.68.195422 [ Abstract | Previous article | Next article | Issue 19 ] |
A new free weekly publication from APS 
Read the latest from Physics:
Viewpoint: Are iron pnictides new cuprates? |
About PROLA | Terms and Conditions | Subscriptions | Search | Help
Content in PROLA © 2009 by The American Physical Society All rights reserved. PROLA™ is a trademark of The American Physical Society. Use of APS online journals implies that the user has read and agrees to the Terms and Conditions in the Subscription Agreement.