Electronic structure of a new magnetic Weyl semimetal candidate CeAlSi by using ARPES*

Weyl semimetals with Weyl fermions denotes an electronic phase of matter in which two bands cross linearly in space. Here, using high-resolution angle-resolved photoemission spectroscopy, we have clearly resolved the distinct surface Fermi arcs along the Γ-M direction on the (001) surface of the candidate magnetic Weyl semimetal CeAlSi. In addition to this, the soft X-ray ARPES data shows the presence of Weyl nodes in this material. The obtained ARPES results are further supported by our systematic electronic structure calculations, thus confirming the presence of Fermi arcs and Weyl nodes in this material.

 

* This work is supported by the Air Force Office of Scientific Research MURI (FA9550-20-1-0322).