Versatile tunable optical injection of chiral polarized Weyl fermions in a magnetic Weyl semimetal Co₃Sn₂S₂.

ABSTRACT: Precise probe and control of various quantum degrees of freedom in novel quantum matters are central to understanding fundamental quantum physics and hold promise for innovative routes to encode and process information. Chirality is one such degree of freedom that has recently attracted intense research interest, especially for Weyl fermions in topological Weyl semimetals. The coupling of chiral degrees of freedom through light‒matter interactions and the versatile control of these couplings through external fields can lead to precise quantum control of Weyl fermions. In this work, we demonstrate the observation of light chirality-dependent photocurrent in the mid-infrared regime. Excitation wavelength-dependent measurements reveal that the photocurrent originates from the injection of chi

SUBMITTER: Fan Z 

PROVIDER: S-EPMC12704104 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature