学术报告：Techniques and Materials for Van der Waals Heterostructures
报告人：Prof. James Hone (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, we 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, TMDs, 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.
James hone is currently Wang Fong-Jen Professor of Mechanical Engineering at Columbia University, and direct 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. Prof. Hone is pioneering in the field of two-dimensional materials. He has published a number of top-ranking journal papers in this field, including 19 Science, 4 Nature, 1 Cell, 13 Nature Nanotechnology, 6 Nature Materials, 5 Nature Photonics, 7 Nature Physics, and 20 PRL. These papers have been cited over 60000, and his H-index is 93.
1. Ju, L. et al., "Tunable excitons in bilayer graphene", Science 358, 6365 (2017)
2.Wang, L., et al., "Evidence for a fractional fractal quantum Hall effect in graphene superlattices", Science 350, 1231-1234 (2015)
3.Wu, W.Z., et al., "Piezoelectricity of single-atomic-layer MoS2 for energy conversion and piezotronics", Nature 514, 470-474 (2014).
4.Wang, L., "One-Dimensional Electrical Contact to a Two-dimensional materials" Science 342, 6158 (2013)
5. Lee, G.H., et al., "High-Strength Chemical-Vapor Deposited Graphene and Grain Boundaries", Science 340, 1073-1076 (2013).
6. Dean, C.R., et al., "Hofstadter's butterfly and the fractal quantum Hall effect in moire superlattices", Nature 497, 598-602 (2013).