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Structural and Dynamical Features of Multiple Metastable Glassy States in a Colloidal System with Competing Interactions

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2010

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Royall, C. Patrick
Tanaka, Hajime

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https://doi.org/10.1103/PhysRevLett.104.165702
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http://arxiv.org/abs/1002.1502

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Physical Review Letters. American Physical Society. 2010, 104(16), 165702. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.104.165702

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Systems in which a short-ranged attraction and long-ranged repulsion compete are intrinsically frustrated, leading their structure and dynamics to be dominated either by mesoscopic order or by metastable disorder. Here, we report the latter case in a colloidal system with long-ranged electrostatic repulsions and short-ranged depletion attractions. We find a variety of states exhibiting slow nondiffusive dynamics: a gel, a glassy state of clusters, and a state reminiscent of a Wigner glass. Varying the interactions, we find a continuous crossover between the Wigner and cluster glassy states, and a sharp discontinuous transition between the Wigner glassy state and gel. Our results suggest that a balance between repulsions and attractions controls the nature of dynamic arrest of these glassy states.

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530 Physik

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ISO 690KLIX, Christian L., C. Patrick ROYALL, Hajime TANAKA, 2010. Structural and Dynamical Features of Multiple Metastable Glassy States in a Colloidal System with Competing Interactions. In: Physical Review Letters. American Physical Society. 2010, 104(16), 165702. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.104.165702
BibTex
@article{Klix2010-04-23Struc-51678,
  year={2010},
  doi={10.1103/PhysRevLett.104.165702},
  title={Structural and Dynamical Features of Multiple Metastable Glassy States in a Colloidal System with Competing Interactions},
  number={16},
  volume={104},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Klix, Christian L. and Royall, C. Patrick and Tanaka, Hajime},
  note={Article Number: 165702}
}
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    <dcterms:abstract xml:lang="eng">Systems in which a short-ranged attraction and long-ranged repulsion compete are intrinsically frustrated, leading their structure and dynamics to be dominated either by mesoscopic order or by metastable disorder. Here, we report the latter case in a colloidal system with long-ranged electrostatic repulsions and short-ranged depletion attractions. We find a variety of states exhibiting slow nondiffusive dynamics: a gel, a glassy state of clusters, and a state reminiscent of a Wigner glass. Varying the interactions, we find a continuous crossover between the Wigner and cluster glassy states, and a sharp discontinuous transition between the Wigner glassy state and gel. Our results suggest that a balance between repulsions and attractions controls the nature of dynamic arrest of these glassy states.</dcterms:abstract>
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