Fig. 4: The second harmonic Hall response of two polymorphs of monolayer WTe2.
From: Second harmonic Hall responses of insulators as a probe of Berry curvature dipole
a The schematic for the 2H phase of WTe2 with D3h point group symmetry. b The schematic for the 1Td phase of WTe2 with a two-fold symmetric Cs point group. c The contributing terms to second harmonic generation susceptibility spectra (solid lines) and the interband Berry curvature dipole (red diamonds) for the 2H phase of WTe2. d The same for the 1Td phase.
