Dynamics and energetics of Ge(001) dimers

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The dynamic behavior of surface dimers on Ge(001) has been studied by positioning the tip of a scanning tunneling microscope over single flip-flopping dimers and measuring the tunneling current as a function of time. We observe that not just symmetric, but also asymmetric appearing dimers exhibit flip-flop motion. The dynamics of flip-flopping dimers can be used to sensitively gauge the local potential landscape of the surface. Through a spatial and time-resolved measurement of the flip-flop frequency of the dimers, local strain fields near surface defects can be accurately probed.
Original languageUndefined
Pages (from-to)266104-
Number of pages4
JournalPhysical review letters
Issue number26
Publication statusPublished - 2006


  • METIS-235739
  • IR-73061

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