4.3 Characterization
GIWAXS images were acquired by using a Xeuss WAXS system, and the active
layers were deposited on the Si substrates. The linearly polarized laser
beam of 520 nm with about a 2 mm diameter was combined with a 1/2 wave
plate and a 1/4 wave plate to generate a switchable linearly and
circularly polarized laser. Magneto-photocurrent was performed by
recording photocurrent as a function of the magnetic field which was
applied parallel to the sample plane.