Discovery of a magnetic Dirac system with large intrinsic non-linear Hall effect

Abstract

Magnetic materials exhibiting topological Dirac fermions are attracting significant attention for their promising technological potential in spintronics. In these systems, the combined effect of the spin-orbit coupling and magnetic order enables the realization of novel topological phases with exotic transport properties, including the anomalous Hall effect and magneto-chiral phenomena. Herein, we report experimental signature of topological Dirac antiferromagnetism in TaCoTe2 via angle-resolved photoelectron spectroscopy (ARPES) and first-principles density functional theory (DFT) calculations. In particular, we find the existence of spin-orbit coupling-induced gaps at the Fermi level, consistent with the manifestation of a large intrinsic non-linear Hall conductivity. Remarkably, we find that the latter is extremely sensitive to the orientation of the Néel vector, suggesting TaCoTe2 a suitable candidate for the realization of non-volatile spintronic devices with an unprecedented level of intrinsic tunability.

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Cited by in corpus (9)

• Nonlinear Valley Hall Effect
• Disorder in the non-linear anomalous Hall effect of $\mathcal{P}\mathcal{T}$-symmetric Dirac fermions
• Crossed Nonlinear Dynamical Hall Effect in Twisted Bilayers
• Discovering two-dimensional magnetic topological insulators by machine learning
• Bilayer orthogonal ferromagnetism in CrTe${}_2$-based van der Waals system
• Extended Kohler's Rule of Magnetoresistance in TaCo${}_2$Te${}_2$
• The electronic structure of intertwined kagome, honeycomb, and triangular sublattices of the intermetallics MCo${}_2$Al${}_9$
• Quantum metric non-linear Hall effect in an antiferromagnetic topological insulator thin-film EuSn2As2
• C-type antiferromagnetic structure of topological semimetal CaMnSb${}_2$