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(a) STM image of coexisting single layer and BLG. (b) Line profile across the line marked in part a showing the apparent height variation across the SLG to BLG boundary. (c) Schematic depiction of an electron bound just outside of a surface by polarization it induces. (d) Schematic depiction of (Stark shifted) image potential derived states (horizontal red lines) in an STM experiment where a potential well is created by the combined image potential and linear potential between the tip and sample.
Changes in IPS’s due to unintended tip changes. (a) SLG and (b) BLG measured with the same two tip conditions as in part (a).
(a) Current dependent distance-voltage spectra measured for SLG. (b) Current dependent distance-voltage spectra measured for BLG with the same tip condition as in part (a). (c) Current dependent position extracted for the state of SLG (open symbols) and BLG (closed symbols). Dependencies for two different tip conditions (triangle vs squares) are shown.
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