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NOMATEN HYBRID-SEMINAR June 7: Twistronics: a new platform for exploring physics and applications in 2D

Date
Place
Online: https://uw-edu-pl.zoom.us/j/94906674246?pwd=WUtEcmlIYmlXSVlsVjkwZC8wNkZGQT09
Meeting ID: 949 0667 4246
Access code: 545531
In-person: Auditorium 0.06 of Department of Physics, University of Warsaw
Location: https://goo.gl/maps/zohWBc

 

NOMATEN HYBRID-SEMINAR

online: https://uw-edu-pl.zoom.us/j/94906674246?pwd=WUtEcmlIYmlXSVlsVjkwZC8wNkZGQT09
In-person: Auditorium 0.06 of Department of Physics, University of Warsaw: https://goo.gl/maps/zohWBcS8XFxMgsK17

Wednesday, June 7th  2023 13:30 CET

Twistronics: a new platform for exploring physics and applications in 2D

Dr. Efthimios Kaxiras
John Hasbrouck Van Vleck Professor of Physics and Chair, Physics Department
Harvard University, USA.

 

Abstract:

When layers of two-dimensional (2D) materials are stacked on top of each with a relative twist, the resulting reconstruction pattern ("moiré pattern") dominates the electronic behavior. Depending on the twist angle, the moiré scale can be several orders of magnitude larger than the scale of the underlying atomic lattices, and the lead to emergent behavior, including superconductivity. This field of physics in 2D materials has been named “twistronics”. In this talk we will review studies of such systems using ab initio-derived effective hamiltonians that capture the physics accurately and efficiently. The results of these computational studies provide insight into the underlying nature of electronic states and phonon modes which are sensitive to the twist angle and stacking composition. These findings also provide guidance for understanding the observed correlated states, superconductivity, and the experimental realization of novel devices.

 

Bio:

Dr Efthimios Kaxiras is the esteemed John Hasbrouck Van Vleck Professor of Pure and Applied Physics at Harvard University, Massachusetts. He is recognized for his exceptional contributions to the field of physics and holds joint appointments in the Department of Physics and the School of Engineering and Applied Sciences. Additionally, he is an esteemed affiliate of the Department of Chemistry and Chemical Biology, further showcasing his multidisciplinary expertise. As the Founding Director of the Institute for Applied Computational Science, Dr Kaxiras has played a pivotal role in advancing the application of computational methods in scientific research. His visionary leadership has contributed to the establishment and growth of this esteemed institution, providing a platform for cutting-edge computational research and fostering innovation at the intersection of science and technology. In recognition of his outstanding contributions to the field, Efthimios Kaxiras has been honored as a Fellow of the American Physical Society, showcasing his exemplary achievements and influence within the physics community. Furthermore, he has been recognized as a Chartered Physicist and Fellow of the Institute of Physics, London, solidifying his status as a highly esteemed and respected physicist.

 

Dr. Efthimios Kaxiras

 

Galeria
Dr. Efthimios Kaxiras


This project has received funding from the European Union Horizon 2020 research and innovation
programme under grant agreement No 857470 and from European Regional Development Fund
via Foundation for Polish Science International Research Agenda PLUS programme grant
No MAB PLUS/2018/8.
Poland
The project is co-financed from the state budget within the framework of the undertaking of the Minister of Science and Higher Education "Support for the activities of Centers of Excellence established under Horizon 2020".

Grant: 5 143 237,70 EUR
Total value: 29 971 365,00 EUR
Date of signing the funding agreement: December 2023

The purpose of the undertaking is to support entities of the higher education and science system that have received funding from the European Union budget in the competition H2020-WIDESPREAD-2018-2020/WIDESPREAD-01-2018-2019: Teaming Phase 2. in the preparation, implementation and updating of activities, maintenance of material resources necessary for carrying out activities, acquisition and modernization of scientific and research apparatus, maintenance and development of personnel potential necessary for the implementation of activities, and dissemination of the results of scientific activities.