Emergent multistability in assembled nanostructures.
basic_science · Level V
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- Record sourced from PubMed, PMID 21591678.
- Also identified by DOI 10.1021/nl2009444.
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Abstract
Scanning tunneling microscopy (STM) at 5 K reveals that native atoms in the surface layer of a semiconductor crystal become bistable in vertical height when a nanostructure is assembled nearby. The binary switching of surface atoms, driven by the STM tip, changes their charge state. Coupling is facilitated by assembling adatom chains, allowing us to explore the emergence of complex multiple switching. Density-functional theory calculations rationalize the observations and a lattice-gas model predicts the cooperative behavior from first principles.
Medical subject headings
- Nanostructures