Techniques and Materials for Van der Waals heterostructures (James Hone, Columbia University)

Techniques and Materials for Van der Waals heterostructures

James Hone
Wang Fong-Jen Professor of Mechanical Engineering
Department of Mechanical Engineering
Center for Precision Assembly of Superstratic and Superatomic Solids
Columbia University

Artificial van der Waals heterostructures of two-dimensional materials offer the possibility of creating layered structures with a wide variety of starting materials and control of composition at the single atomic layer limit. To create such structures, developed a van der Waals transfer technique which largely eliminates interfacial contamination. We have used this technique to encapsulate 2D materials within crystalline h-BN with nearly perfect interfaces, which allows for near-intrinsic behavior in materials such as graphene, transition metal dichalcogenides semiconductors, and 2D superconductors. However, significant challenges toward functional heterostructures remain. This talk will detail our recent progress in the materials engineering for van der Waals heterostructures, including control over disorder, achieving robust electrical contacts, controlling interlayer rotation angle, and improving the quality of the constituent materials.

Mini-CV

James Hone is currently Wang Fong-Jen Professor of Mechanical Engineering at Columbia University, and director of PAS³, Columbia’s Materials Science Research and Engineering Center (MRSEC).  He received his BS in physics from Yale in 1990, and PhD in experimental condensed matter physics from UC Berkeley in 1998, and did postdoctoral work at the University of Pennsylvania and Caltech, where he was a Millikan Fellow.  He joined the Columbia faculty in 2003.