1. B20 Weyl semimetal CoSi film fabricated by flash-lamp annealing
- Author
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Li, Z., Yuan, Y., Hübner, R., Rebohle, L., Zhou, Y., Helm, M., Nielsch, K., Prucnal, S., and Zhou, S.
- Abstract
B20-CoSi is a newly discovered Weyl semimetal that crystallizes into a non-centrosymmetric crystal structure. However, the investigation of B20-CoSi has so far been focused on bulk materials, whereas the growth of thin films on technology-relevant substrates is a prerequisite for most practical applications. In this study, we have used millisecond-range flash-lamp annealing, a non-equilibrium solid-state reaction, to grow B20-CoSi thin films. By optimizing the annealing parameters, we were able to obtain thin films with a pure B20-CoSi phase. The magnetic and transport measurements indicate the appearance of the charge density wave and the chiral anomaly. Our work presents a promising method for preparing thin films of most binary B20 transition-metal silicides, which are candidates for topological Weyl semimetals.
- Published
- 2023