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(a) Polarization degree vs of the C2 coil at and for a positive (triangles) and a negative (circles) pulse with a current amplitude of . (b) Normalized response (purple circles, left axis, the solid line serves a guide to the eyes) and variation in the spin temperature (blue squares, right axis) vs delay time . The experiments have been performed at and .
(a) Scanning electron micrograph of the C2 structure. (b) PL polarization degree vs current amplitude. The dashed lines indicate the linear relation at small currents. In the inset, is plotted vs for , 8, and 20 K, respectively.
Spatially resolved PL polarization degree across the B2 coil (see inset, the red arrow indicates the scan path). The current amplitude was and , and the solid lines serve as guides for the eyes.
(a) Spatially resolved average polarization degree across B2 at and (red circles, left axis). Blue squares indicate the local variation in the spin temperature (right axis). The solid lines serve as guides to the eyes. (b) Comparison of the current-induced magnetic field evaluated from (circles) and from theory (lines).
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