| Abstract [eng] |
A promising technological direction for the next generation of electronic devices is based on combining bulk (3D) and two-dimensional (2D) materials. However, there is a lack of knowledge in one of the fundamental mechanisms of combined 2D-3D devices – charge transport perpendicular to the 2D material plane. This thesis presents a study of charge transfer perpendicular to a graphene plane, where a graphene monolayer is positioned between two conductive metallic planes and coupled by forces of electrostatic nature (van der Waals type contact). By creating external mechanical and electrical effects in the metal-graphene-metal (MGM) structure with the use of atomic force microscopy techniques, the atypical electrical characteristics of the system were measured as a function of applied external mechanical force. Using a physical model describing the system, the mechanisms underlying the atypical charge transfer were explained. In the second part of the thesis, the electrostatic interaction forces between the components of the MGM structure are investigated. The dependencies of the electrostatic forces on the applied external electric field were experimentally measured. The measured dependencies were described by a set of characteristic parameters following from a physical model of the system, thus evaluating the influence of the external voltage on the interaction forces between the components of the structure and determining the magnitude of the occurring internal electric field. |
