Structural ordering of trapped colloids with competing interactions

Campos, L. Q. Costa; Apolinario, S. W. S.; Löwen, Hartmut

doi:10.1103/physreve.88.042313

Cited by 24 publications

(21 citation statements)

References 50 publications

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“…tems with long-range repulsive interaction [26][27][28][29][30], chains here originate in non-pairwise intervortex forces.…”

Section: Introductionmentioning

confidence: 99%

Vortex chains due to nonpairwise interactions and field-induced phase transitions between states with different broken symmetry in superconductors with competing order parameters

Garaud¹,

Babaev²

2015

Phys. Rev. B

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We study superconductors with two order components and phase separation driven by intercomponent density-density interaction, focusing on the phase where only one condensate has non-zero ground state density and competing order parameter exists only in vortex cores. We demonstrate there, that multi-body intervortex interactions can be strongly non-pairwise, leading to some unusual vortex patterns in external field, such as vortex pairs and vortex chains. We demonstrate that, in external magnetic field, such system undergoes a field-driven phase transition from (broken) U (1) to (broken) U (1)×U (1) symmetries, when subdominant order parameter in the vortex cores acquires global coherence. Observation of these characteristic ordering patterns in surface probes may signal the presence of a subdominant condensate in the vortex core.

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“…tems with long-range repulsive interaction [26][27][28][29][30], chains here originate in non-pairwise intervortex forces.…”

Section: Introductionmentioning

confidence: 99%

Vortex chains due to nonpairwise interactions and field-induced phase transitions between states with different broken symmetry in superconductors with competing order parameters

Garaud¹,

Babaev²

2015

Phys. Rev. B

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“…[41 ]) w e investigated the selfassem bly o f a tw o-dim ensional system o f colloidal particles interacting through a com petitive tw o-scale pair potential and confined isotropically. T hrough the application o f B row nian dynam ics w e obtained a w ide variety o f stable structures, including clusters w ith an outer fringed edge, clusters pierced by voids, and clusters w ith a crystalline core and a disordered outer ring.…”

Section: Introductionmentioning

confidence: 99%

“…We consider the sam e interaction potential used in our previous article Ref. [41], that is, a tw o-scale pair potential w hich is repulsive at short and long distances and has a flat w ell part in betw een. We present a detailed phase diagram indicating how the various phases o f the system s are influenced by the anisotropy o f the confinem ent potential.…”

Section: Introductionmentioning

confidence: 99%

Structural orderings of anisotropically confined colloids interacting via a quasi-square-well potential

Campos

Apolinario

2015

Phys. Rev. E

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We implement Brownian dynamics to investigate the static properties of colloidal particles confined anisotropically and interacting via a potential which can be tailored in a repulsive-attractive-respulsive fashion as the interparticle distance increases. A diverse number of structural phases are self-assembled, which were classified according to two aspects, that is, their macroscopic and microscopic patterns. Concerning the microscopic phases we found the quasicrystalline, triangular, square, and mixed orderings, where this latter is a combination of square and triangular cells in a 3×2 proportion, i.e., the so-called (3(3),4(2)) Archimedian lattice. On the macroscopic level the system could self-organize in a compact or perforated single cluster surrounded or not by fringes. All the structural phases are summarized in detailed phases diagrams, which clearly show that the different phases are extended as the confinement potential becomes more anisotropic.

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“…As already stated, the kind of potential considered in this paper was used in previous 2D simulations (see [47,51]). The structures found in these previous works called our attention due to their peculiarity and variety.…”

Section: Resultsmentioning

confidence: 99%

Complex structures generated by competing interactions in harmonically confined colloidal suspensions

Lima¹,

Pereira²,

Löwen³

et al. 2018

J. Phys.: Condens. Matter

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We investigate the structural properties of colloidal particle systems interacting via an isotropic pair potential and confined by a three-dimensional harmonic potential. The interaction potential has a repulsive-attractive-repulsive profile that varies with the interparticle distance (also known as a 'mermaid' potential). We performed Langevin dynamics simulations to find the equilibrium configurations of the system. We show that particles can self-assemble in complex structural patterns, such as compact disks, fringed disks, rods, spherical clusters with superficial entrances among others. Also, for particular values of the parameters of the interaction potential, we could identify that some configurations were formed by quasi two-dimensional (2D) structures which are stable for 2D systems.

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Structural ordering of trapped colloids with competing interactions

Cited by 24 publications

References 50 publications

Vortex chains due to nonpairwise interactions and field-induced phase transitions between states with different broken symmetry in superconductors with competing order parameters

Vortex chains due to nonpairwise interactions and field-induced phase transitions between states with different broken symmetry in superconductors with competing order parameters

Structural orderings of anisotropically confined colloids interacting via a quasi-square-well potential

Complex structures generated by competing interactions in harmonically confined colloidal suspensions

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