Aarhus University Seal / Aarhus Universitets segl

Philip Hofmann

Controllable magnetic doping of the surface state of a topological insulator

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review


  • pdf

    9,84 MB, PDF-dokument


  • T. Schlenk
  • ,
  • M. Bianchi
  • Mohammad Koleini, Department of Physics and Astronomi, Interdisciplinary NanoScience Center, Aarhus, Danmark
  • A. Eich
  • ,
  • O. Pietzsch
  • ,
  • T. O. Wehling
  • ,
  • T. Frauenheim
  • ,
  • A. Balatsky
  • ,
  • J. -L. Mi
  • ,
  • Bo Brummerstedt Iversen
  • J. Wiebe
  • ,
  • A. A. Khajetoorians
  • ,
  • Philip Hofmann
  • R. Wiesendanger
A combined experimental and theoretical study of doping individual Fe atoms into Bi2Se3 is presented. It is shown through a scanning tunneling microscopy study that single Fe atoms initially located at hollow sites on top of the surface (adatoms) can be incorporated into subsurface layers by thermally-activated diffusion. Angle-resolved photoemission spectroscopy in combination with ab-initio calculations suggest that the doping behavior changes from electron donation for the Fe adatom to neutral or electron acceptance for Fe incorporated into substitutional Bi sites. According to first principles calculations within density functional theory, these Fe substitutional impurities retain a large magnetic moment thus presenting an alternative scheme for magnetically doping the topological surface state. For both types of Fe doping, we see no indication of a gap at the Dirac point.
TidsskriftPhysical Review Letters
Sider (fra-til)126804
Antal sider5
StatusUdgivet - 2013


  • cond-mat.mtrl-sci, cond-mat.mes-hall

Se relationer på Aarhus Universitet Citationsformater


Ingen data tilgængelig

ID: 53437239