Figure 3.

Manipulation of ${\mathit{J}}_y^{\mathrm{s}}$ by B _ext. a) Amplitude of ${\mathit{J}}_y^{\mathrm{s}}$ versus B _ext∥ y for linearly (red) and circularly (blue) polarized pump pulses and β = 120°. The solid curves are sigmoid fits. b) The additional contribution to ${\mathit{J}}_y^{\mathrm{s}}$ while applying | B _ext| = 1 T is extracted by taking ${\mathit{J}}_y^{\mathrm{s}}(B_{\mathrm{ext}})-{\mathit{J}}_y^{\mathrm{s}}(0\mathrm{T})$. A linear pump polarization (θ = 0) is used in the measurement. c) Analogous to panel (b) for circular pump polarization. The solid lines indicate the average values of ${\mathit{J}}_y^{\mathrm{s}}$ when B _ext is 1 T (red) or ‐1 T (blue). Note that the vertical offset of all data is as measured.