Role of hydrogen in giant spin polarization observed on magnetic nanostructures

Werner A. Hofer, Krisztián Palotás, Stefano Rusponi, Tristan Cren, Harald Brune

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We demonstrate that the giant spin contrast observed by scanning tunneling microscopy for double-layer Coislands on Pt(111) is caused by adsorbates at the apex of the Cr-coated W tip. The most likely candidate, in ab initio simulations, is hydrogen. Here, the electron charge is highly polarized by the adjacent Cr layers. The hydrogen adsorption site is shown to change from hollow to on top due to the electric field at the tip apex, created by the tunnel voltage.

Original languageEnglish
Article number026806
JournalPhysical review letters
Volume100
Issue number2
DOIs
Publication statusPublished - Jan 17 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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