I will discuss our recent progress in the research of quantum properties of van der Waals materials. The advent of Van der Waals technology has allowed the development of many materials that did not exist before and has led to the observation of many exciting new physical phenomena in these materials due to the unique electronic, optical and mechanical properties of 2D atomic crystals. In particular, I will discuss how interlayer twist angle and stacking order can be used for deterministic control of the properties of van der Waals materials. Tuning twist angle (twistronics) became recently a huge field since electronic bands of 2D materials, their nontrivial topology, electron-electron interactions, and other structural and electronic degrees of freedom can be dramatically changed by a moiré pattern induced by twist angles between different layers. On the other hand, control of the stacking order provides an alternative approach to program quantum properties, and without the need of a moiré superlattice. Controlling stacking order in multilayer graphite films allowed us to discover the quantum Hall effect in hexagonal graphite and to find strong electronic correlations in rhombohedral graphite films.
About Speaker :
Artem Mishchenko is a Professor of Condensed Matter Physics, he works at the Department of Physics and Astronomy at the University of Manchester. His research on 2D materials and van der Waals heterostructures covers a diverse range of topics including tunneling and capacitance spectroscopy in high magnetic fields, quantum Hall ferromagnets and other correlated electron systems, topological surface states, photovoltaics and light emission, 2D superconductivity, crystal growth, nanomechanics, high-temperature electronics, ion and matter transport in 2D systems, twistronics, and advanced van der Waals technology. The major contributions to these and other fields have been published in over 90 peer-refereed papers, including many in Science and Nature journals, leading to more than 20,000 citations and an h-index of 43. He has initiated several new research directions, such as tunneling and capacitance spectroscopy of van der Waals heterostructures; his works led to the development of new functional devices, including nanoscale tunneling transistors and photovoltaic sensors. As a recognition of his achievements, he has received several awards including EPSRC Early Career Fellowship, ERC Consolidator Grant, EMFL Prize 2018, and Blavatnik Award 2021. He is also named in 2018, 2019, and 2020 lists of Highly Cited Researchers from Clarivate Analytics.