期刊
SCIENTIFIC REPORTS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep08276
关键词
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资金
- EPSRC
- Advantage West Midlands (AWM)
- European Regional Development Fund (ERDF)
- Academy of Finland
- Academy of Finland through its Centres of Excellence Program [251748]
- Engineering and Physical Sciences Research Council [EP/K006061/1, GR/R89509/01] Funding Source: researchfish
- EPSRC [EP/K006061/1] Funding Source: UKRI
Atomic manipulation in the scanning tunnelling microscopy, conventionally a tool to build nanostructures one atom at a time, is here employed to enable the atomic-scale imaging of a model low-dimensional system. Specifically, we use low-temperature STM to investigate an ultra thin film (4 atomic layers) of potassium created by epitaxial growth on a graphite substrate. The STM images display an unexpected honeycomb feature, which corresponds to a real-space visualization of the Wigner-Seitz cells of the close-packed surface K atoms. Density functional simulations indicate that this behaviour arises from the elastic, tip-induced vertical manipulation of potassium atoms during imaging, i.e. elastic atomic manipulation, and reflects the ultrasoft properties of the surface under strain. The method may be generally applicable to other soft e.g. molecular or biomolecular systems.
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