Fig. 1: NLAHE measurement schematic and sample characterization.
From: Giant c-axis nonlinear anomalous Hall effect in Td-MoTe2 and WTe2
a Main panel: crystal structure of MoTe2 in the Td phase and device geometry. Purple, blue, and gray flakes represent MoTe2, h-BN, and graphene, respectively. Inset shows optical image of 70-nm-thick device. h-BN blocking layers, graphene, and the bottom vertical contact are outlined in blue, gray, and red, respectively. Scale bar is 5 μm. b Symmetrized magnetoresistance (MR) of 47-nm-thick device with current applied along the a and b crystal axes at 1.4 K. \(I\parallel a\) (\(I\parallel b\)) exhibits quadratic (linear) MR. c Angle-dependent second harmonic generation (SHG) intensity measured on the same sample. Minimum (maximum) intensity occurs along the a-axis (b-axis).
