Abstract
We report Langevin simulations on the collective depinning of driven monolayer active colloidal particles over the disordered substrate. The active colloidal particles are modeled as Janus particles interacting with magnetic dipole and Mie-type potentials. On increasing the Mie-type potential exponent , we find a peak of critical pinning force at
. Above the depinning, there are living islands when the exponent
is less than
, and they disappear once
is larger than
. Further increasing the exponent
will lead to moving crystal structures above the depinning. Moreover, the peak of critical pinning force occurs at a weaker strength of magnetic-dipole interaction as
is increased to be a larger value, and it disappears as
is further increased over
. Finally, the critical pinning force remains basically unchanged with the strength of Mie-type potential, except for the system of
, where the critical pinning force decreases with the strength of Mie-type potential. Our results are helpful to understand the formation of self-organisation in electromagnetic interaction biological systems driven by external field.
Disclosure statement
No potential conflict of interest was reported by the author(s).