Berry curvature signatures in chiroptical excitonic transitions

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

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.

Details

Original languageEnglish
Article numbereadk3897
Number of pages9
JournalScience advances
Volume10 (2024)
Issue number26
Publication statusPublished - 28 Jun 2024
Peer-reviewedYes

External IDs

PubMed 38941460

Keywords

ASJC Scopus subject areas