Tierno, Pietro2016-03-022016-03-022016-01-220031-9007https://hdl.handle.net/2445/96048We study the phase behavior and the collective dynamics of interacting paramagnetic colloids assembled above a honeycomb lattice of triangular shaped magnetic minima. A frustrated colloidal molecular crystal is realized when filling these potential minima with exactly two particles per pinning site. External in-plane rotating fields are used to anneal the system into different phases, including long range ordered stripes, random fully packed loops, labyrinth and disordered states. At a higher amplitude of the annealing field, the dimer lattice displays a two-step melting transition where the initially immobile dimers perform first localized rotations and later break up by exchanging particles across consecutive lattice minima.5 p.application/pdfeng(c) American Physical Society, 2016Cristalls molecularsCol·loidesMolecular crystalsColloidsinfo:eu-repo/semantics/article6574232016-03-02info:eu-repo/semantics/openAccess26849619