Extended Data Fig. 3: Rapid glide of a node connecting four screw dislocations in niobium.

Three different events are shown, all corresponding to the same mechanism as in Figs. 1 and 2 where four screw dislocations connected to a node glide in two different planes over a large distance in less than 40 ms. The event in a, b was obtained in the same area as in Extended Data Fig. 2 after further deformation. The second set (d, e) was obtained in the same sample in a neighbouring area and precedes the event described in Fig. 2. The last event (g, h) comes from the same sample as that described in Fig. 1 after a rather large amount of deformation. The two sets of traces are remarkably similar for each sample, namely c and f on the one hand, i and Fig. 1c on the other.