journal article·2023-06-28Open access

B20 Weyl Semimetal CoSi Film Fabricated by Flash-Lamp Annealing

Zichao Li, Ye Yuan, René Hübner, Lars Rebohle, Yan Zhou, Manfred Helm, Kornelius Nielsch, Slawomir Prucnal, Shengqiang Zhou

ACS Applied Materials & Interfaces· Volume 15· Issue 25

Abstract

B20-CoSi is a newly discovered Weyl semimetal that crystallizes into a noncentrosymmetric 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 nonequilibrium 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 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.
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Research context

OpenAlex topics: Topological Materials and Phenomena · Iron-based superconductors research · Boron and Carbon Nanomaterials Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany

Institute of Materials Science, Technische Universität Dresden, 01069 Dresden, Germany

Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People’s Republic of China

School of Science and Engineering, Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China

Institute of Applied Physics, Technische Universität Dresden, 01062 Dresden, Germany

Institute for Metallic Materials, IFW Dresden, Dresden 01069, Germany

Funding

Basic and Applied Basic Research Foundation of Guangdong Province · Deutsche Forschungsgemeinschaft · China Scholarship Council

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