Figure 2
From: Long-range non-diffusive spin transfer in a Hall insulator
Propagation of spin over macroscopic distances. (a) Top left: photo-excitation spot seen in photoluminescence light (0e-0hh optical transition). Bottom left and top right: images of magnetofermionic condensate obtained with PRR at excitation in two different sample areas under similar experimental conditions (T ≈ 0.5 K). Excitation spot is marked with an orange circle. Bottom right: Cross sections of photoluminescence and PRR intensity along the lines at images (color denotes image). (b) Temperature dependence of the spin propagation area. The phase transition to the magnetofermionic condensate is enclosed between two dashed lines. (c) Evolution of spin propagation area with temperature. Upper part is averaged and filtered experimental data. Lower part is binarized image with red color corresponding to the presence of magnetofermionic condensate. P = 80 mW/cm2. (d) PRR images of the same sample area obtained at different excitation spot positions marked with an orange circle. Note, that concentric line pattern at left part of the images corresponds to an artifact of an imaging system. (e) Cross sections of PRR image (blue curve) and probing light pattern (orange curve) along the same straight line. Everywhere scale bars are equal to 30 μm.
