Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.075701
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Funding
- Non-Equilibrium Energy Research Center (NERC), an Energy Frontier Research Center
- U.S. DOE [DE-SC0000989]
- DOD/ASD(RE) [N00244-09-1-0062]
- FP7 Marie Curie Actions of the European Commission [PIOF-GA-2011-302490 Actsa]
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We investigate collective phenomena with rotationally driven spinners of concave shape. Each spinner experiences a constant internal torque in either a clockwise or counterclockwise direction. Although the spinners are modeled as hard, otherwise noninteracting rigid bodies, their active motion induces an effective interaction that favors rotation in the same direction. With increasing density and activity, phase separation occurs via spinodal decomposition, as well as self-organization into rotating crystals. We observe the emergence of cooperative, superdiffusive motion along interfaces, which can transport inactive test particles. Our results demonstrate novel phase behavior of actively rotated particles that is not possible with linear propulsion or in nondriven, equilibrium systems of identical hard particles.
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