Extended Data Fig. 6: Control valley with E∙B field.
From: Orbital multiferroicity in pentalayer rhombohedral graphene
a & b, Plots of valley polarization correspond to the Rxy plot in Figs. 3d and e with B > 0 (a) and B < 0 (b), featuring two hysteresis loops winding in opposite ways. However, if we plot the x-axis as the E ∙ B field, the two loops will collapse into one, which demonstrates that the conjugate field of the valley is E ∙ B. Blue (yellow) lines labels scanning to positive (negative) E direction. The arrows indicate the scanning direction.
