Weyl nodes and magnetostructural instability in antiperovskite Mn3ZnC

S. M.L. Teicher, I. K. Svenningsson, L. M. Schoop, R. Seshadri

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number121104
JournalAPL Materials
Volume7
Issue number12
DOIs
StatePublished - Dec 1 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

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