Electronic properties of (2x1) and c(4x2) domains on Ge(001) studied by scanning tunneling spectroscopy

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The surface electronic structure of Ge(001) was studied by scanning tunneling spectroscopy. The measured surface densities of states unequivocally reveal the presence of a metallic state on the (2×1) domains, which is absent on the c(4×2) domains. This metallic state, so far observed only in integral measurements, is attributed to the flip-flopping dimers that constitute the (2×1) domains. Our data also reveal a set of previously unresolved surface states, in perfect agreement with published theoretical predictions
Original languageUndefined
Pages (from-to)066101-
Number of pages4
JournalPhysical review letters
Issue number6
Publication statusPublished - 2004


  • METIS-220686
  • IR-48896

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