Monolayer Semiconductors

Silicon may be unable to continue serving as the backbone for future technologies. The search for silicon replacements has led to the investigation of thin 2-D materials. Some of these materials are single layers of group VI transition metal dichalcogenides. Through mechanical exfoliation, these materials can be isolated and used to construct monolayer field effect transistors. A transfer process can be used to control the placement of monolayers and exfoliated samples. Investigation of the photoluminescence of these materials has shown that they possess strong electrical tunability in the form of electrostatic doping, and that quantum coherence may be generated between the states associated with the 2-D hexagonal Brillouin zone corners. It is suggested that an improved transferring process be sought after in order to further investigate the properties of these materials.