2026-04-17T01:48:42Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1589462025-12-04T20:44:02Zcom_2072_1057col_2072_478822col_2072_478917

urn:hdl:2445/158946 Collective directional locking of colloidal monolayers on a periodic substrate Stoop, Ralph L. Straube, Arthur V. Johansen, Tom H. Tierno, Pietro Col·loides Matèria condensada tova Colloids Soft condensed matter We investigate the directional locking effects that arise when a monolayer of paramagnetic colloidal particles is driven across a triangular lattice of magnetic bubbles. We use an external rotating magnetic field to generate a two-dimensional traveling wave ratchet forcing the transport of particles along a direction that intersects two crystallographic axes of the lattice. We find that, while single particles show no preferred direction, collective effects induce transversal current and directional locking at high density via a spontaneous symmetry breaking. The colloidal current may be polarized via an additional bias field that makes one transport direction energetically preferred. 2020-05-06T14:18:35Z 2020-05-06T14:18:35Z 2020-02-04 2020-05-06T14:18:35Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.124.058002 Physical Review Letters, 2020, vol. 124, num. 5, p. 058002 https://doi.org/10.1103/PhysRevLett.124.058002 info:eu-repo/grantAgreement/EC/H2020/811234/EU//ENFORCE (c) American Physical Society, 2020 info:eu-repo/semantics/openAccess American Physical Society Articles publicats en revistes (Física de la Matèria Condensada)