Black Phosphorus n-type doping by Cu: a microscopic surface investigation
Abhishek Kumar,
Francesca Telesio,
Deborah Prezzi
et al.
Abstract:We study surface charge transfer doping of exfoliated black phosphorus (bP) flakes by copper using scanning tunneling microscopy (STM) and spectroscopy (STS) at room temperature. The tunneling spectra reveal a gap in correspondence of Cu islands, which is attributed to Coulomb blockade phenomena. Moreover, using line spectroscopic measurements across small copper islands, we exploit the potential of the local investigation, showing that the n-type doping effect of copper on bP is short-ranged. These experiment… Show more
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