Insights and Implications of Intricate Surface Charge Transfer and sp³-Defects in Graphene/Metal Oxide Interfaces.

ABSTRACT: Adherence of metal oxides to graphene is of fundamental significance to graphene nanoelectronic and spintronic interfaces. Titanium oxide and aluminum oxide are two widely used tunnel barriers in such devices, which offer optimum interface resistance and distinct interface conditions that govern transport parameters and device performance. Here, we reveal a fundamental difference in how these metal oxides interface with graphene through electrical transport measurements and Raman and photoelectron spectroscopies, combined with ab initio electronic structure calculations of such interfaces. While both oxide layers cause surface charge transfer induced p-type doping in graphene, in sharp contrast to TiO_x, the AlO_x/graphene interface shows the presence of a

SUBMITTER: Belotcerkovtceva D 

PROVIDER: S-EPMC9376919 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature