Presentation Information
[1G04]From Fabrication to Spectroscopy of 2D TMD-Based Heterostructures
*Ryo Kitaura1 (1. National Institute for Materials Science)
Low-dimensional materials—such as carbon nanotubes, graphene, hexagonal boron nitride (hBN), and transition-metal dichalcogenides (TMDs)—offer an exciting platform for nanoscale science. Recent advances in two-dimensional systems have made them a central focus in materials research, particularly for their role as building blocks for heterostructures, including heterojunctions, stacked layers, and moiré superlattices. We have been working on combining thin-film growth techniques, such as metal-organic chemical vapor deposition, with stamp-transfer methods to fabricate 2D-semiconductor-based heterostructures that exhibit gate-tunable carrier dimensionality, enabling transitions between one- and two-dimensional regimes, as well as optical responses absent in the individual materials. This talk will present recent progress in both the fabrication of such heterostructures and their optical characterization, including polarization-resolved spectroscopy to probe valley coherence in TMDs and their stacks, along with a discussion of strain effects in moiré systems.