Plasmon model for image-potential-induced surface states with an application to positrons at metal surfaces

Research output: Contribution to journalArticleScientificpeer-review


Research units

  • Nordita
  • CNRS


A variational method is presented to calculate dynamic corrections to the image potential of a charged particle at a metal-vacuum interface and hence to calculate its binding energy. The response of the metal is treated within the plasmon approximation. As an application, a model for positron surface states on simple metals is studied. It predicts the existence of bound positron surface states in Al, Ga, Zn, Cd, and possibly other high-density simple metals. Further, the resulting localized positron state would have a lifetime 2 to 3 times longer than in the bulk.


Original languageEnglish
Pages (from-to)2568-2576
Number of pages9
JournalPhysical Review B
Issue number6
Publication statusPublished - 15 Sep 1978
MoE publication typeA1 Journal article-refereed

ID: 6591758