Fig. 4: Berry curvature (BC) and related transport signatures in B1u mode.
From: Robust and tunable Weyl phases by coherent infrared phonons in ZrTe5
a–c Intensity plot showing the distribution of the Ωy component of the BC on the FS calculated from the model Hamiltonian for different values of c which roughly corresponds to Q of 1, 2, and 4 respectively. The Fermi level is set from the DFT results. d, e Dxy component of BCDM as a function of μ and Q respectively calculated using the ab initio Hamiltonian. μ = 0 corresponds to the charge neutral point. The black horizontal line in panel (d) corresponds approximately to WP energy for the case when Weyl points occur whereas for the gapped case, it corresponds to the average of the valence band maximum and conduction band minimum. f Schematic diagram of the nonlinear transverse hall response in the presence of an external electric field and inversion symmetry breaking perturbation like B1u phonon mode.
