Pseudodoping of a metallic two-dimensional material by the supporting substrate.

ABSTRACT: Charge transfers resulting from weak bondings between two-dimensional materials and the supporting substrates are often tacitly associated with their work function differences. In this context, two-dimensional materials could be normally doped at relatively low levels. Here, we demonstrate how even weak hybridization with substrates can lead to an apparent heavy doping, using the example of monolayer 1H-TaS₂ grown on Au(111). Ab-initio calculations show that sizable changes in Fermi areas can arise, while the transferred charge between substrate and two-dimensional material is much smaller than the variation of Fermi areas suggests. This mechanism, which we refer to as pseudodoping, is associated with non-linear energy-dependent shifts of electronic spectra, which our scanning t

SUBMITTER: Shao B 

PROVIDER: S-EPMC6331619 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature