Helical Packings and Phase Transformations of Soft Spheres in Cylinders

Details Helical Packings and Phase Transformations of Soft Spheres in Cylinders Helical Packings and Phase Transformations of Soft Spheres in Cylinders

2010-04-02

arxiv.org/abs/1004.0362v1

Phys. Rev. E 81 (2010) 040401(R)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, with additional 4 pages of supplemental material, accepted to Physical Review E: Rapid Communications

Scientific paper

10.1103/PhysRevE.81.040401

The phase behavior of helical packings of thermoresponsive microspheres inside glass capillaries is studied as a function of volume fraction. Stable packings with long-range orientational order appear to evolve abruptly to disordered states as particle volume fraction is reduced, consistent with recent hard sphere simulations. We quantify this transition using correlations and susceptibilities of the orientational order parameter psi_6. The emergence of coexisting metastable packings, as well as coexisting ordered and disordered states, is also observed. These findings support the notion of phase transition-like behavior in quasi-1D systems.

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