Figure 4
From: Spin-momentum locked spin manipulation in a two-dimensional Rashba system
Transverse magnetic focusing without spin polarization and quantized conductance in a lateral QPC device. (a) Transverse magnetic focusing measured without spin resolution (VSR = VSL = 0 V) at VTG = 3.0 V (blue line). The measurement temperature was 1.5 K. Resistance of collector constriction is detected while sweeping Bop field between −1 to +2.5 T with constant bias current Ie = 100 nA applied in emitter constriction. The red line corresponds to longitudinal resistance measured simultaneously in Hall bar connected to the lateral QPC. (b) Conductance of emitter (red line) and collector (blue line) QPCs as a function of VSR and VSL at T = 1.5 K. The top gate is fixed at VTG = 4.0 V, where α = 6.0 × 10−12 eVm. Both QPCs show the spin polarized plateau at around 0.5(2e2/h).
