Ultrafast Nanoscopy of an Exciton Mott Transition in Twisted Bilayer WSe2
Paper in proceeding, 2022
The density-driven transition of an exciton gas into a plasma of unbound electron-hole pairs has provided a compelling testbed for exploring many-body physics. Here, we use ultrafast polarization nanoscopy to trace a Mott transition of excitons in a twisted bilayer of WSe2. An initially monomolecular recombination of optically dark excitons continuously evolves into bimolecular recombination of unbound electrons and holes as the density is increased. Furthermore, we reveal directly how the Mott transition varies on nanometer length scales, demonstrating how the technique is indispensable in the study of intrinsically disordered van der Waals materials.
Author
Thomas Siday
University of Regensburg
Fabian Sandner
University of Regensburg
Samuel Brem
Chalmers, Physics, Condensed Matter and Materials Theory
Philipps University Marburg
Martin Zizlsperger
University of Regensburg
Raul Perea Causin
Chalmers, Physics, Condensed Matter and Materials Theory
Felix Schiegl
University of Regensburg
Svenja Nerreter
University of Regensburg
Markus Plankl
University of Regensburg
Philipp Merkl
University of Regensburg
F. Mooshammer
University of Regensburg
Columbia University
Markus A. Huber
University of Regensburg
Ermin Malic
Philipps University Marburg
Chalmers, Physics, Condensed Matter and Materials Theory
Rupert Huber
University of Regensburg
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
21622027 (ISSN) 21622035 (eISSN)
Vol. August9781728194271 (ISBN)
47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022
Delft, Netherlands,
Delft, Netherlands,
Subject Categories
Atom and Molecular Physics and Optics
Other Physics Topics
Condensed Matter Physics
DOI
10.1109/IRMMW-THz50927.2022.9895814