Weyl nodes and magnetostructural instability in antiperovskite Mn${}_3$ZnC

Abstract

The ferromagnetic phase of the cubic antiperovskite Mn${}_3$ZnC 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 Mn${}_3$ZnC undergoes transitions upon cooling from a paramagnetic to a cubic ferromagnetic state under ambient conditions and then further into a non-collinear ferrimagnetic tetragonal phase at a temperature between 250K and 200K. The existence of Weyl nodes and their destruction via structural and magnetic ordering is likely to be relevant to a range of magnetostructurally coupled materials.

References in corpus (20)

• The electronic properties of graphene
• Weyl and Dirac Semimetals in Three Dimensional Solids
• WannierTools: An open-source software package for novel topological materials
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Topological Nodal Line Semimetal and Dirac Semimetal State in Antiperovskite Cu${}_3$PdN
• Fermi surface nesting and the origin of Charge Density Waves in metals
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Topological semi-metals with line nodes and drumhead surface states
• Time-Reversal-Breaking Weyl Fermions in Magnetic Heusler Alloys
• Unfolding spinor wavefunctions and expectation values of general operators: Introducing the unfolding-density operator
• Topological Crystalline Insulators and Dirac Octets in Anti-perovskites
• Superconductivity in the antiperovskite Dirac-metal oxide Sr${}_3$SnO
• Chiral degeneracies and Fermi-surface Chern numbers in bcc Fe
• Three-Dimensional Dirac Electrons at the Fermi Energy in Cubic Inverse Perovskites: Ca_3PbO and its Family
• Low-Energy Effective Hamiltonian and the Surface States of Ca_3PbO
• Magnetoentropic signatures of skyrmionic phase behavior in FeGe
• Pseudo Dirac Nodal Sphere: Unusual Electronic Structure and Material Realization
• Survey of the class of isovalent antiperovskite alkaline earth-pnictide compounds
• Magnetotransport in Sr3PbO antiperovskite with three-dimensional massive Dirac electrons
• Two-dimensional Peierls instability via zone boundary Dirac line nodes in layered perovskite oxides

Cited by in corpus (1)

• Axionic Band Topology in Inversion-Symmetric Weyl-Charge-Density Waves