Berry Curvature Signatures in Chiroptical Excitonic Transitions
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866916308251049984 |
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| author | Beaulieu, Samuel Dong, Shuo Christiansson, Viktor Werner, Philipp Pincelli, Tommaso Ziegler, Jonas D. Taniguchi, Takashi Watanabe, Kenji Chernikov, Alexey Wolf, Martin Rettig, Laurenz Ernstorfer, Ralph Schüler, Michael |
| author_facet | Beaulieu, Samuel Dong, Shuo Christiansson, Viktor Werner, Philipp Pincelli, Tommaso Ziegler, Jonas D. Taniguchi, Takashi Watanabe, Kenji Chernikov, Alexey Wolf, Martin Rettig, Laurenz Ernstorfer, Ralph Schüler, Michael |
| contents | 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 WSe$_2$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_09634 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Berry Curvature Signatures in Chiroptical Excitonic Transitions Beaulieu, Samuel Dong, Shuo Christiansson, Viktor Werner, Philipp Pincelli, Tommaso Ziegler, Jonas D. Taniguchi, Takashi Watanabe, Kenji Chernikov, Alexey Wolf, Martin Rettig, Laurenz Ernstorfer, Ralph Schüler, Michael Materials Science Mesoscale and Nanoscale Physics 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 WSe$_2$ 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. |
| title | Berry Curvature Signatures in Chiroptical Excitonic Transitions |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2308.09634 |