%0 Journal Article %1 beaulieuberry %A Beaulieu, Samuel %A Dong, Shuo %A Christiansson, Viktor %A Werner, Philipp %A Pincelli, Tommaso %A Ziegler, Jonas D. %A Taniguchi, Takashi %A Watanabe, Kenji %A Chernikov, Alexey %A Wolf, Martin %A Rettig, Laurenz %A Ernstorfer, Ralph %A Schüler, Michael %B Sci. Adv. %D 2024 %I American Association for the Advancement of Science %J Sci. Adv. %K a %N 26 %P eadk3897 %R 10.1126/sciadv.adk3897 %T Berry curvature signatures in chiroptical excitonic transitions %U https://doi.org/10.1126/sciadv.adk3897 %V 10 %X 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. Berry curvature texture is revealed by measurement of energy- and momentum-resolved optical transition rates.

@article{beaulieuberry, abstract = {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. Berry curvature texture is revealed by measurement of energy- and momentum-resolved optical transition rates.}, added-at = {2024-07-18T12:16:54.000+0200}, author = {Beaulieu, Samuel and Dong, Shuo and Christiansson, Viktor and Werner, Philipp and Pincelli, Tommaso and Ziegler, Jonas D. and Taniguchi, Takashi and Watanabe, Kenji and Chernikov, Alexey and Wolf, Martin and Rettig, Laurenz and Ernstorfer, Ralph and Schüler, Michael}, biburl = {https://www.bibsonomy.org/bibtex/269c4ea37ab7bfcbe269fdc47c0ab181c/ctqmat}, booktitle = {Sci. Adv.}, comment = {doi: 10.1126/sciadv.adk3897}, day = 28, doi = {10.1126/sciadv.adk3897}, interhash = {188eaf84af8db3442c195357c92f9cac}, intrahash = {69c4ea37ab7bfcbe269fdc47c0ab181c}, journal = {Sci. Adv.}, keywords = {a}, month = {06}, number = 26, pages = {eadk3897}, publisher = {American Association for the Advancement of Science}, timestamp = {2024-07-18T12:16:54.000+0200}, title = {Berry curvature signatures in chiroptical excitonic transitions}, url = {https://doi.org/10.1126/sciadv.adk3897}, volume = 10, year = 2024 }