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Looking at electrons without touching Physicists in Canada have developed a new way to investigate single-electron effects in quantum structures without the need to attach leads to the system being studied. The method, dubbed electrostatic force spectroscopy, relies on an atomic force microscope and has a spatial resolution of 50 nanometres (R Stomp et al. 2005 arXiv/cond-mat/0501272). Quantum structures are semiconductor structures that confine electrons in one, two or three directions.
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