Phys.org June 19, 2024
A spintronic THz emitter consisting of a ferromagnetic/nonmagnetic bilayer heterostructure is a promising innovation that can provide an alternative solution/replacement for conventional THz emitters. To extend the applicability of THz waves researchers in Japan developed and demonstrated an efficient and strong THz emission from a single layer of Co2MnGa with a large anomalous Hall effect (AHE) influenced by its Weyl semimetallic nature. They showed strong correlations among the THz emission, AHE, and chemical ordering of the full Heusler crystal structures for Co2MnGa. Based on proper structural and chemical design, the topological nature of this material facilitates systematic optimization. According to the researchers their findings provide a new design concept for the topological influences on spin-based THz emitters, and facilitate the further development of the intriguing Weyl physics… read more. Open Access TECHNICAL ARTICLEÂ
Laser-induced THz emission from the Weyl semimetal. Credit: NPG Asia Materials volume 16, Article number: 30 (2024)Â