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Condensed Matter > Materials Science
Title: Chirality-Driven Orbital Angular Momentum and Circular Dichroism in CoSi
(Submitted on 3 Apr 2024)
Abstract: Chiral crystals and molecules were recently predicted to form an intriguing platform for unconventional orbital physics. Here, we report the observation of chirality-driven orbital textures in the bulk electronic structure of CoSi, a prototype member of the cubic B20 family of chiral crystals. Using circular dichroism in soft X-ray angle-resolved photoemission, we demonstrate the formation of a bulk orbital-angular-momentum texture and monopole-like orbital-momentum locking that depends on crystal handedness. We introduce the intrinsic chiral circular dichroism, icCD, as a differential photoemission observable and a natural probe of chiral electron states. Our findings render chiral crystals promising for spin-orbitronics applications.
Submission history
From: Stefanie Brinkman [view email][v1] Wed, 3 Apr 2024 18:00:00 GMT (7756kb,D)
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