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Toggling bistable atoms via mechanical switching of bond angle

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • Adam Sweetman
  • Samuel Jarvis
  • Rosanna Danza
  • Joseph Bamidele
  • Subhashis Gangopadhyay
  • Gordon A. Shaw
  • Lev Kantorovich
  • Philip Moriarty
Article number136101
<mark>Journal publication date</mark>28/03/2011
<mark>Journal</mark>Physical review letters
Issue number13
Number of pages4
Publication StatusPublished
<mark>Original language</mark>English


We reversibly switch the state of a bistable atom by direct mechanical manipulation of bond angle using a dynamic force microscope. Individual buckled dimers at the Si(100) surface are flipped via the formation of a single covalent bond, actuating the smallest conceivable in-plane toggle switch (two atoms) via chemical force alone. The response of a given dimer to a flip event depends critically on both the local and nonlocal environment of the target atom-an important consideration for future atomic scale fabrication strategies.