Tunneling Electron Induced Bromine Hopping on [Formula presented]

Koji S. Nakayama, E. Graugnard, J. H. Weaver

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Tunneling electrons from the tip of a scanning tunneling microscope can be used to induce adatom hopping on Br-terminated [Formula presented] at low current and without voltage pulses. Hopping does not occur when electrons tunnel from a sample to a tip. The threshold energy is [Formula presented], and tunneling spectroscopy shows antibonding Si-Br states 0.8 eV above the Fermi level. Electron capture in these states is a necessary condition for hopping, but repulsive adsorbate interactions that lower the activation barrier are also required. Such interactions are strong near saturation for Br but are insufficient when the coverage is low or when Br is replaced by Cl.

Original languageEnglish
JournalPhysical Review Letters
Volume89
Issue number26
DOIs
Publication statusPublished - 2002 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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