Extended Data Fig. 1: Ferroelectric states.
From: Ferroelectric and spontaneous quantum Hall states in intrinsic rhombohedral trilayer graphene
a,b, Map of the resistance difference between forward and backward sweep of the electric field as function of electric field and charge carrier density at B = 3 T in a and B = 8 T in b. The region with vanishing conductance at zero density has been removed due to large resistance variations to enhance visibility.
