Motivated by the Kibble-Zurek mechanism and the Gubser's argument for the
charged scalar hairs near the black hole horizon in a spacetime with negative
cosmological constant, we realize the kink hairs in a planar Schwarzschild-AdS
black hole. By increasing the chemical potential across the critical point of
the dual boundary field theory, the former Z2​ symmetry of the real scalar
fields spontaneously break and form kinks in the bulk. Correspondingly, in the
AdS boundary it resembles the kinks in a one-dimensional chain. The relation
between the kink numbers and the quench rate obeys a universal scaling law
which satisfies the Kibble-Zurek's prediction.Comment: 10 pages; 3 figure