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Title: Weyl nodes and magnetostructural instability in antiperovskite Mn3ZnC

Journal Article · · APL Materials
DOI: https://doi.org/10.1063/1.5129689 · OSTI ID:1599424

The room temperature ferromagnetic phase of the cubic antiperovskite Mn3ZnC is suggested from first-principles calculation to be a nodal line Weyl semimetal. Features in the electronic structure that are the hallmark of a nodal line Weyl state—a large density of linear band crossings near the Fermi level—can also be interpreted as signatures of a structural and/or magnetic instability. Indeed, it is known that Mn3ZnC undergoes transitions upon cooling from a paramagnetic to a cubic ferromagnetic state under ambient conditions and then further into a noncollinear ferrimagnetic tetragonal phase at a temperature between 250 K and 200 K. The existence of Weyl nodes and their destruction via structural and magnetic ordering are likely to be relevant to a range of magnetostructurally coupled materials.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Science Foundation (NSF); Princeton Center for Complex Materials, a Materials Research Science and Engineering Center (MRSEC); USDOE Office of Science (SC), Basic Energy Sciences (BES); IRES: Cooperative for Advanced Materials in Energy-Related Applications; Chalmers University of Technology
Grant/Contract Number:
DMR1710638; DMR 1420541; DMR 1720256; CNS 1725797; AC02-06CH11357; NSF-OISE 1827034; DGE-1650114
OSTI ID:
1599424
Journal Information:
APL Materials, Vol. 7, Issue 12; ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH

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