Intrinsic Nonlinear Hall Effect in Antiferromagnetic Tetragonal CuMnAs

2010/04/08 by Chong Wang, Yang Gao, Di Xiao +3 · 31 citations
Business, Management and Accounting · Social Sciences · #Innovative Approaches in Technology and Social Development #E-Government and Public Services

paper · doi:10.1103/physrevlett.127.277201

Abstract

Detecting the orientation of the Néel vector is a major research topic in antiferromagnetic spintronics. Here we recognize the intrinsic nonlinear Hall effect, which is independent of the relaxation time, as a prominent contribution to the time-reversal-odd second order conductivity and can be used to detect the reversal of the Néel vector. In contrast, the Berry-curvature-dipole-induced nonlinear Hall effect depends linearly on relaxation time and is time-reversal even. We study the intrinsic nonlinear Hall effect in an antiferromagnetic metal: tetragonal CuMnAs, and show that its nonlinear Hall conductivity can reach the order of mA/V². The dependence on the chemical potential of such nonlinear Hall conductivity can be qualitatively explained by a tilted massive Dirac model. Moreover, we demonstrate its strong temperature dependence and briefly discuss its competition with the second order Drude conductivity. Finally, a complete survey of magnetic point groups is presented, providing guidelines for finding more antiferromagnetic materials with the intrinsic nonlinear Hall effect.

Citations

• Field Induced Positional Shift of Bloch Electrons and Its Dynamical Implications
• Intrinsic Second-Order Anomalous Hall Effect and Its Application in Compensated Antiferromagnets

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