Third-order charge transport in a magnetic topological semimetal

Abstract

Magnetic topological materials and their physical signatures are a focus of current research. Here, by first-principles calculations and symmetry analysis, we reveal topological semimetal states in an existing antiferromagnet ThMn2Si2. Depending on the Néel vector orientation, the topological band crossings near the Fermi level form either a double-nodal loop or two pairs of Dirac points,which are all fourfold degenerate and robust under spin-orbit coupling. These topological features produce large Berry connection polarizability, which leads to enhanced nonlinear transport effects. Particularly, we evaluate the third order current response, which dominates the transverse charge current. We show that the nonlinear response can be much more sensitive to topological phase transitions than linear response, which offers a powerful tool for characterizing magnetic topological semimetals.

5 pages, 5 figures

References in corpus (14)

• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Topological Node-Line Semimetal in Three Dimensional Graphene Networks
• Topological nodal line semimetals
• Anomalous Hall Effect in Weyl Metals
• Intrinsic nonlinear Hall effect in antiferromagnetic tetragonal CuMnAs
• Intrinsic Second-Order Anomalous Hall Effect and Its Application in Compensated Antiferromagnets
• Berry connection polarizability tensor and third-order Hall effect
• Intrinsic Nonlinear Spin Magnetoelectricity in Centrosymmetric Magnets
• Systematic investigation of emergent particles in type-III magnetic space groups
• Encyclopedia of emergent particles in type-IV magnetic space groups
• Exhaustive constructions of effective models in 1651 magnetic space groups
• Multiple magnetism controlled topological states in EuAgAs
• A $k\cdot p$ effective Hamiltonian generator

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• Planar Hall Plateau in Magnetic Weyl Semimetals
• A topological Hund nodal line antiferromagnet
• Tunable linear and nonlinear anomalous Hall transport in two-dimensional CrPS${}_4$
• Band Geometry Induced Third-Harmonic Generation