Extended Data Fig. 6: PCFM imaging of edge photocurrent in WTe2 Device A.
From: Visualization of bulk and edge photocurrent flow in anisotropic Weyl semimetals
(a) Zoomed-in optical micrograph of WTe2 Device A. The photoexcitation locations for the PCFM and NV phase images to follow are labeled by their figure panel. (b) PCFM image of J(r) for photoexciting the \(\langle 1\overline{1}0\rangle\) edge with P = 70 μW. (c) PCFM image for photoexciting the 〈110〉 edge with P = 120 μW. (d) NV center phase map Δφ(r) for photoexciting the 〈100〉 edge in Device A, corresponding to the reconstructed J(r) shown in Fig. 4d of the main text. (e) Phase map Δφ(r) corresponding to the J(r) image in b). (f) Phase map Δφ(r) corresponding to the J(r) image in c).
