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Figure 4
Energy spectra of the tip current (left) on different surface areas under the same tunneling conditions (−2 V, 0.3 nA). Spectra (a) and (b) were obtained at the areas shown in the right-hand part of the figure (35 nm × 35 nm, −2 V, 0.3 nA).

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SYNCHROTRON
RADIATION
ISSN: 1600-5775
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