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Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe <sub>2</sub> and MoTe <sub>2</sub>

Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe <sub>2</sub> and MoTe <sub>2</sub>

We studied the nonlinear electric response in WTe2 and MoTe2 monolayers. When the inversion symmetry is breaking but the the time-reversal symmetry is preserved, a second-order Hall effect called the nonlinear anomalous Hall effect (NLAHE) emerges owing to the nonzero Berry curvature on the nonequilibrium Fermi surface. We reveal a …