Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions
Recent literature indicates that attractive interactions between particles of a dense liquid play a secondary role in determining its bulk mechanical properties. Here we show that, in contrast with their apparent unimportance to the bulk mechanics of dense liquids, attractive interactions can have a...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/151104 |
| _version_ | 1811682148923473920 |
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| author | González-López, Karina Shivam, Mahajan Zheng, Yuanjian Ciamarra, Massimo Pica Lerner, Edan |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences González-López, Karina Shivam, Mahajan Zheng, Yuanjian Ciamarra, Massimo Pica Lerner, Edan |
| author_sort | González-López, Karina |
| collection | NTU |
| description | Recent literature indicates that attractive interactions between particles of a dense liquid play a secondary role in determining its bulk mechanical properties. Here we show that, in contrast with their apparent unimportance to the bulk mechanics of dense liquids, attractive interactions can have a major effect on macro- and microscopic elastic properties of glassy solids. We study several broadly applicable dimensionless measures of stability and mechanical disorder in simple computer glasses, in which the relative strength of attractive interactions—referred to as “glass stickiness”—can be readily tuned. We show that increasing glass stickiness can result in the decrease of various quantifiers of mechanical disorder, on both macro- and microscopic scales, with a pair of intriguing exceptions to this rule. Interestingly, in some cases strong attractions can lead to a reduction of the number density of soft, quasilocalized modes, by up to an order of magnitude, and to a substantial decrease in their core size, similar to the effects of thermal annealing on elasticity observed in recent works. Contrary to the behavior of canonical glass models, we provide compelling evidence indicating that the stabilization mechanism in our sticky-sphere glasses stems predominantly from the self-organized depletion of interactions featuring large, negative stiffnesses. Finally, we establish a fundamental link between macroscopic and microscopic quantifiers of mechanical disorder, which we motivate via scaling arguments. Future research directions are discussed. |
| first_indexed | 2024-10-01T03:52:14Z |
| format | Journal Article |
| id | ntu-10356/151104 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:52:14Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1511042023-02-28T19:56:14Z Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions González-López, Karina Shivam, Mahajan Zheng, Yuanjian Ciamarra, Massimo Pica Lerner, Edan School of Physical and Mathematical Sciences Science::Physics Elasticity Disordered Systems Recent literature indicates that attractive interactions between particles of a dense liquid play a secondary role in determining its bulk mechanical properties. Here we show that, in contrast with their apparent unimportance to the bulk mechanics of dense liquids, attractive interactions can have a major effect on macro- and microscopic elastic properties of glassy solids. We study several broadly applicable dimensionless measures of stability and mechanical disorder in simple computer glasses, in which the relative strength of attractive interactions—referred to as “glass stickiness”—can be readily tuned. We show that increasing glass stickiness can result in the decrease of various quantifiers of mechanical disorder, on both macro- and microscopic scales, with a pair of intriguing exceptions to this rule. Interestingly, in some cases strong attractions can lead to a reduction of the number density of soft, quasilocalized modes, by up to an order of magnitude, and to a substantial decrease in their core size, similar to the effects of thermal annealing on elasticity observed in recent works. Contrary to the behavior of canonical glass models, we provide compelling evidence indicating that the stabilization mechanism in our sticky-sphere glasses stems predominantly from the self-organized depletion of interactions featuring large, negative stiffnesses. Finally, we establish a fundamental link between macroscopic and microscopic quantifiers of mechanical disorder, which we motivate via scaling arguments. Future research directions are discussed. Ministry of Education (MOE) Published version We warmly thank Srikanth Sastry, Geert Kapteijns, David Richard, Eran Bouchbinder, and J. Chattoraj for fruitful discussions. We are indebted to David Richard for providing us Stillinger-Weber computer glasses and elasticity data. E.L. acknowledges support from the Netherlands Organisation for Scientific Research (NWO) (Vidi Grant no. 680-47-554/3259). K.G.L. gratefully acknowledges the computer resources provided by the Laboratorio Nacional de Supercómputo del Sureste de México, CONACYT member of the national laboratories network. M.P.C. acknowledges support from the Singapore Ministry of Education through the Academic Research Fund MOE2017-T2-1-066 (S). Parts of this work were carried out on the Dutch national e-infrastructure with the support of SURF Cooperative. 2021-06-29T02:34:49Z 2021-06-29T02:34:49Z 2021 Journal Article González-López, K., Shivam, M., Zheng, Y., Ciamarra, M. P. & Lerner, E. (2021). Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions. Physical Review E, 103(2), 022605-. https://dx.doi.org/10.1103/PhysRevE.103.022605 2470-0045 https://hdl.handle.net/10356/151104 10.1103/PhysRevE.103.022605 33736046 2-s2.0-85101278402 2 103 022605 en MOE2017-T2-1-066 (S) Physical Review E © 2021 American Physical Society (APS). All rights reserved. This paper was published in Physical Review E and is made available with permission of American Physical Society (APS). application/pdf |
| spellingShingle | Science::Physics Elasticity Disordered Systems González-López, Karina Shivam, Mahajan Zheng, Yuanjian Ciamarra, Massimo Pica Lerner, Edan Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions |
| title | Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions |
| title_full | Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions |
| title_fullStr | Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions |
| title_full_unstemmed | Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions |
| title_short | Mechanical disorder of sticky-sphere glasses. I. Effect of attractive interactions |
| title_sort | mechanical disorder of sticky sphere glasses i effect of attractive interactions |
| topic | Science::Physics Elasticity Disordered Systems |
| url | https://hdl.handle.net/10356/151104 |
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