Fig. 4: Rashba SOC effect on monolayer GeS BSPV photoconductivity.
From: Pure bulk orbital and spin photocurrent in two-dimensional ferroelectric materials
Momentum space distribution of a \(\left\langle {L_z} \right\rangle\), b \(\left\langle {S_z} \right\rangle\), and c velocity texture \(\left( {\left\langle {v_x} \right\rangle,\left\langle {v_y} \right\rangle } \right)\) of VB–1 and VB in the first BZ. d BSPV response function under different SOC strength parameter λ. Inset: The peak magnitude change of BSPV \(\sigma _{xx}^{x;S_z}\left( {\omega = 2.83\,{\mathrm{eV}}} \right)\) as a function of λ. Linear relation can be clearly seen. One has to note that the band dispersion will be significantly changed under very strong SOC, so that such linearity may not hold when λ is very big.
