Seminarium Fizyki Ciała Stałego
sala 0.03, ul. Pasteura 5
2019-05-17 (10:15) 
dr Roman Gorbachev (Faculty of Science and Engineering, University of Manchester)
“Novel materials for van der Waals heterostructures and advances in their nanofabrication”
In the last years, a novel field has emerged which deals with structures and devices assembled layer-by-layer from various atomically-thin crystals. These new multi-layer structures have proved to be extremely versatile, showing exceptional electronic and optical properties, new physics and new functionality. In this talk I will review recent progress and discuss new additions to the 2D material family, their fabrication and transport properties.
I will then discuss the broad picture of 2D field development and current limiting factors in nanofabrication, such as crystal quality, contamination and environmental sensitivity of various 2D materials. I will introduce new techniques developed recently in Manchester that allow heterostructure assembly in ultra-high vacuum and compare properties of archetypal atomically thin crystals fabricated in different environments.
Lastly, I will focus on a novel material, indium monoselenide and present broad range of our results on its structural, optical and electronic properties. In-plane electronic transport, vertical resonant tunnelling experiments and PLE will be discussed as a measure of subband structure of the multilayer crystals can be mapped out, and shift of the subbands in transverse electric field measured experimentally through quantum confined Stark effect.
I will then discuss the broad picture of 2D field development and current limiting factors in nanofabrication, such as crystal quality, contamination and environmental sensitivity of various 2D materials. I will introduce new techniques developed recently in Manchester that allow heterostructure assembly in ultra-high vacuum and compare properties of archetypal atomically thin crystals fabricated in different environments.
Lastly, I will focus on a novel material, indium monoselenide and present broad range of our results on its structural, optical and electronic properties. In-plane electronic transport, vertical resonant tunnelling experiments and PLE will be discussed as a measure of subband structure of the multilayer crystals can be mapped out, and shift of the subbands in transverse electric field measured experimentally through quantum confined Stark effect.