Strain Engineering of Berry-Curvature Multipoles in Non-centrosymmetric Weyl Semimetals TmTm'Te₄ (Tm = Ta/Nb and Tm' = Ir/Rh).

Berry-curvature multipoles generalize how geometric band properties manifest in nonlinear transport. The topic of strain engineering of Berry-curvature multipoles in 2D Weyl semimetals and it's effect of non-linear transport remains unexplored. We present strain dependent symmetry-resolved measurements of nonlinear Hall effects, i.e. second and higher-order harmonic signals, in few-layer noncentrosymmetric Weyl semimetals TmTm'Te₄ (Tm = Ta/Nb and Tm' = Ir/Rh). Our study will help optimize the nonlinear transport in quantum materials, which will be useful in many applications including high-frequency rectifiers, infrared detection, and THz generation.