title: Role of spin in quasiparticle interference.
abstract: Quasiparticle interference patterns measured by scanning tunneling microscopy can be used to study the local electronic structure of metal surfaces and high-temperature superconductors. Here, we show that even in nonmagnetic systems the spin of the quasiparticles can have a profound effect on the interference patterns. On Bi(110), where the surface state bands are not spin degenerate, the patterns are not related to the dispersion of the electronic states in a simple way. In fact, the features which are expected for the spin-independent situation are absent and the observed interference patterns can be interpreted only by taking spin-conserving scattering events into account.
authors.affiliation: Institut für Experimentalphysik, Freie Universität Berlin, 14195 Berlin, Germany.
authors.forename: J I
authors.initials: JI
authors.lastname: Pascual
authors.forename: G
authors.initials: G
authors.lastname: Bihlmayer
authors.forename: Yu M
authors.initials: YM
authors.lastname: Koroteev
authors.forename: H-P
authors.initials: HP
authors.lastname: Rust
authors.forename: G
authors.initials: G
authors.lastname: Ceballos
authors.forename: M
authors.initials: M
authors.lastname: Hansmann
authors.forename: K
authors.initials: K
authors.lastname: Horn
authors.forename: E V
authors.initials: EV
authors.lastname: Chulkov
authors.forename: S
authors.initials: S
authors.lastname: Blügel
authors.forename: P M
authors.initials: PM
authors.lastname: Echenique
authors.forename: Ph
authors.initials: P
authors.lastname: Hofmann