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SUMMARY:MARVEL Distinguished Lecture — Kristian Sommer Thygesen
DTSTART:20230323T150000
DTEND:20230323T161500
DTSTAMP:20260510T035628Z
UID:fa5d8933f3a96a7dba659ecbef409ab6e15c37a135b197e14d97a762
CATEGORIES:Conferences - Seminars
DESCRIPTION:Kristian Sommer Thygesen\, Technical University of Denmark (D
 TU)\nhttps://epfl.zoom.us/j/68869286373\nPasscode: 4434\n\nProf. Kristian 
 Sommer Thygesen\nTechnical University of Denmark (DTU)\n\nEmergent Propert
 ies in Flatland: When One Plus One is More than Two\nThe field of 2D mater
 ials has evolved with tremendous pace over the past decade and is currentl
 y impacting many contemporary subfields of physics including spintronics
 \, valleytronics\, unconventional superconductivity\, multiferroics\, and
  quantum light sources. Van der Waals (vdW) stacking of 2D materials off
 ers unique opportunities for creating designer structures with novel prop
 erties absent in the constituent monolayers with the emergence of superco
 nducting phases in twisted bilayer graphenebeing a particularly striking 
 example. Unfortunately\, experimental advancements beyond the proof-of-
 principle level are impeded by the vast size of the configuration space de
 fined by layer combinations and stacking orders. To improve on this situa
 tion\, we use an automated density functional theory (DFT) based work
 flow to stack all known monolayers in all possible (non-twisted) stacking 
 configurations. We validate the approach by comparison to experimentally
  observed stacking orders and compute a range of electronic\, magnetic\
 , and vibrational properties for more than 2000 homobilayers. We identi
 fy bilayers that support two or more (meta)stable stackings with different
  magnetic or electrical properties making them candidates for the emerging
  field of slidetronics. If time permits\, I will discuss electrical tun
 ing of excitons in transition metal dichalcogenide homobilayers and pre
 dictions of exciton insulators and superfluidity in Janus bilayers.\n\nAbo
 ut the speaker\nProf. Thygesen develops and applies first-principles met
 hods based on density functional theory and many-body perturbation theory 
 to describe the electronic structure of materials with a particular f
 ocus on low-dimensional materials. He is also interested in data-driven
  approaches to materials design and the development of automated high-th
 roughput workflow software. Prof. Thygesen received his PhD from the Tech
 nical University of Denmark (DTU) in 2005. Today he is heading the sectio
 n for Computational Atomic-scale Materials Design (CAMD) at DTU\, whic
 h is home to core developers of the GPAW electronic structure code and
  the Atomic Simulation Environment (ASE). He is involved in a number of
  international research projects including the EU Center of Excellence NO
 MAD.
LOCATION:https://epfl.zoom.us/j/68869286373?pwd=MlFlVmNWQWRXaGlXdjkvbEhBR3
 BYZz09
STATUS:CONFIRMED
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