Williams, I;
Turci, F;
Hallett, JE;
Crowther, P;
Cammarota, C;
Biroli, G;
Royall, CP;
(2018)
Experimental determination of configurational entropy in a two-dimensional liquid under random pinning.
Journal of Physics: Condensed Matter
, 30
(9)
, Article 094003. 10.1088/1361-648X/aaa869.
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Abstract
A quasi two-dimensional colloidal suspension is studied under the influence of immobilisation (pinning) of a random fraction of its particles. We introduce a novel experimental method to perform random pinning and, with the support of numerical simulation, we find that increasing the pinning concentration smoothly arrests the system, with a cross-over from a regime of high mobility and high entropy to a regime of low mobility and low entropy. At the local level, we study fluctuations in area fraction and concentration of pins and map them to entropic structural signatures and local mobility, obtaining a measure for the local entropic fluctuations of the experimental system.
| Type: | Article |
|---|---|
| Title: | Experimental determination of configurational entropy in a two-dimensional liquid under random pinning |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-648X/aaa869 |
| Publisher version: | https://doi.org/10.1088/1361-648X/aaa869 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, glass transition, random pinning, entropy, GROWING AMORPHOUS ORDER, GLASS-FORMING LIQUIDS, SUPERCOOLED LIQUIDS, HYDRODYNAMIC INTERACTIONS, TRANSITION, COLLOIDS, DYNAMICS, FORMER |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10076414 |
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