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Experimental evidence for a structural-dynamical transition in trajectory space

Pinchaipat, R., Campo, M., Turci, F. ORCID:, Hallett, J. E. ORCID:, Speck, T. and Royall, C. P. (2017) Experimental evidence for a structural-dynamical transition in trajectory space. Physical Review Letters, 119 (2). 028004. ISSN 1079-7114

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To link to this item DOI: 10.1103/PhysRevLett.119.028004


Among the key insights into the glass transition has been the identification of a non-equilibrium phase transition in trajectory space which reveals phase coexistence between the normal supercooled liquid (active phase) and a glassy state (inactive phase). Here we present evidence that such a transition occurs in experiment. In colloidal hard spheres we find a non-Gaussian distribution of trajectories leaning towards those rich in locally favoured structures (LFS), associated with the emergence of slow dynamics. This we interpret as evidence for an non-equilibrium transition to an inactive LFS-rich phase. Reweighting trajectories reveals a first-order phase transition in trajectory space between a normal liquid and a LFS-rich phase. We further find evidence of a purely dynamical transition in trajectory space.

Item Type:Article
Divisions:No Reading authors. Back catalogue items
ID Code:101376
Publisher:American Physical Society

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