This tutorial aims to explore the fabrication of a wide gamut of 2D heterostructures and the physics that emerges from these heterostructures. The 2D heterostructures and the resulting physics have evolved to a high level of sophistication since the early days of scotch-tape-based exfoliation on silicon oxide substrates. Quantum Hall, quantum anomalous Hall, optoelectronic, excitonic, magnetic properties, topological, and superconducting properties of single-layer/few-layer systems have been studied, leading to fundamental new insights. The discovery of moiré superlattices and the engineering of physical properties using exquisite control of twist angles has led to new ways to tune properties of condensed matter systems and emergent properties. An extensive library of 2D materials, starting from graphene, hexagonal boron nitride, transition metal dichalcogenides, layered magnets, and superconductors, has enabled the rapid exploration of a number of physical phenomena.
Topics
- Critical role of high-quality layered materials in unraveling the physics.
- The encapsulation of 2D materials plays a critical role in reducing defects, tuning the dielectric environment, and protecting materials from degradation.
- How electrical contacts are made across systems like graphene and transition metal dichalcogenides for transport and optoelectronic studies.
- Moiré formation and characterization leading to band structure engineering.
- Alternate exfoliation techniques like anodic bonding, cryogenic exfoliation, and gold/alumina-assisted techniques.
Physical phenomena discussed
- Optoelectronics and excitonic physics
- 2D magnetism and superconductivity
- Quantum Hall, quantum anomalous Hall, and aspects of Berry physics
- Josephson Junction physics
Who should attend?
Graduate students, post-docs, and other scientists interested in learning about a wide variety of 2D heterostructure fabrication and the physics that emerges from these heterostructures.