Samuel Beaulieu^1*, Shuo Dong^2,3*, Viktor Christiansson⁴, Philipp Werner⁴, Tommaso Pincelli³, Jonas D. Ziegler⁵, Takashi Taniguchi⁶, Kenji Watanabe⁷, Alexey Chernikov⁵, Martin Wolf³, Laurenz Rettig³, Ralph Ernstorfer^3,8, Michael Schüler^9,4*

1 Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, F33405 Talence, France

2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

3 Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany

4 Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland

5 Institute of Applied Physics and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany

6 Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

7 Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

8 Institut für Optik und Atomare Physik, Technische Universität Berlin, Strasse des 17 Juni 135, 10623 Berlin, Germany

9 Laboratory for Materials Simulations, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland

* Corresponding authors emails: samuel.beaulieu@u-bordeaux.fr, dong@fhi-berlin.mpg.de, michael.schueler@psi.ch

DOI10.24435/materialscloud:zq-tj [version v1]

Publication date: Aug 18, 2023

How to cite this record

Samuel Beaulieu, Shuo Dong, Viktor Christiansson, Philipp Werner, Tommaso Pincelli, Jonas D. Ziegler, Takashi Taniguchi, Kenji Watanabe, Alexey Chernikov, Martin Wolf, Laurenz Rettig, Ralph Ernstorfer, Michael Schüler, Berry curvature signatures in chiroptical excitonic transitions, Materials Cloud Archive 2023.128 (2023), doi: 10.24435/materialscloud:zq-tj.

Description

The topology of the electronic band structure of solids can be described by its Berry curvature distribution across the Brillouin zone. We theoretically introduce and experimentally demonstrate a general methodology based on the measurement of energy- and momentum-resolved optical transition rates, allowing to reveal signatures of Berry curvature texture in reciprocal space. By performing time- and angle-resolved photoemission spectroscopy of atomically thin WSe₂ using polarization-modulated excitations, we demonstrate that excitons become an asset in extracting the quantum geometrical properties of solids. We also investigate the resilience of our measurement protocol against ultrafast scattering processes following direct chiroptical transitions. Here we provide the data presented in the paper referenced below. The data set contains the results of the first-principle calculations of the exciton properties, python scripts for solving the real-time dynamics, and python scripts for generating the plots. We also provide the raw measured photoemission intensity along with the post-processing and corresponding plotting scripts. A more detailed description is provided in the README.md files.

Materials Cloud sections using this data

Files

File name	Size	Description
wse2-exciton-archive.tar.gz MD5md5:b8fbb4a0cdcf0c07d947edfae84fc929	839.9 MiB	The tar.gz file contains two separate folders: a directory where the experimental data is stored (wse2-berry-experiment), and a directory where the calculated data and simulation scripts are stored (wse2-exciton-theory-archive). Each of the directories contains a README.md file that explains the contents and how to run the scripts.

License

Files and data are licensed under the terms of the following license: Creative Commons Attribution 4.0 International.
Metadata, except for email addresses, are licensed under the Creative Commons Attribution Share-Alike 4.0 International license.

External references

Keywords

first principles two-dimensional topological materials Experimental