Attraction tames two-dimensional melting : from continuous to discontinuous transitions
Two-dimensional systems may admit a hexatic phase and hexatic-liquid transitions of different natures. The determination of their phase diagrams proved challenging, and indeed, those of hard disks, hard regular polygons, and inverse power-law potentials have only recently been clarified. In this con...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/145015 |
| _version_ | 1826117331963609088 |
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| author | Li, Yan-Wei Ciamarra, Massimo Pica |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Li, Yan-Wei Ciamarra, Massimo Pica |
| author_sort | Li, Yan-Wei |
| collection | NTU |
| description | Two-dimensional systems may admit a hexatic phase and hexatic-liquid transitions of different natures. The determination of their phase diagrams proved challenging, and indeed, those of hard disks, hard regular polygons, and inverse power-law potentials have only recently been clarified. In this context, the role of attractive forces is currently speculative, despite their prevalence at both the molecular and colloidal scale. Here, we demonstrate, via numerical simulations, that attraction promotes a discontinuous melting scenario with no hexatic phase. At high-temperature, Lennard-Jones particles and attractive polygons follow the shape-dominated melting scenario observed in hard disks and hard polygons, respectively. Conversely, all systems melt via a first-order transition with no hexatic phase at low temperature, where attractive forces dominate. The intermediate temperature melting scenario is shape dependent. Our results suggest that, in colloidal experiments, the tunability of the strength of the attractive forces allows for the observation of different melting scenarios in the same system. |
| first_indexed | 2024-10-01T04:25:52Z |
| format | Journal Article |
| id | ntu-10356/145015 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:25:52Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1450152023-02-28T19:54:10Z Attraction tames two-dimensional melting : from continuous to discontinuous transitions Li, Yan-Wei Ciamarra, Massimo Pica School of Physical and Mathematical Sciences Physics - Soft Condensed Matter Physics - Soft Condensed Matter Physics - Statistical Mechanics Science::Physics Attraction Two-dimensional Two-dimensional systems may admit a hexatic phase and hexatic-liquid transitions of different natures. The determination of their phase diagrams proved challenging, and indeed, those of hard disks, hard regular polygons, and inverse power-law potentials have only recently been clarified. In this context, the role of attractive forces is currently speculative, despite their prevalence at both the molecular and colloidal scale. Here, we demonstrate, via numerical simulations, that attraction promotes a discontinuous melting scenario with no hexatic phase. At high-temperature, Lennard-Jones particles and attractive polygons follow the shape-dominated melting scenario observed in hard disks and hard polygons, respectively. Conversely, all systems melt via a first-order transition with no hexatic phase at low temperature, where attractive forces dominate. The intermediate temperature melting scenario is shape dependent. Our results suggest that, in colloidal experiments, the tunability of the strength of the attractive forces allows for the observation of different melting scenarios in the same system. Ministry of Education (MOE) National Supercomputing Centre (NSCC) Singapore Published version We acknowledge support from the Singapore Ministry of Education through the Academic Research Fund No. MOE2017-T2-1-066 (S), and are grateful to the National Supercomputing Centre (NSCC) of Singapore for providing computational resources. We thank Joyjit Chattoraj for helpful discussions. 2020-12-08T08:13:19Z 2020-12-08T08:13:19Z 2020 Journal Article Li, Y-W., & Ciamarra, M. P. (2020). Attraction tames two-dimensional melting : from continuous to discontinuous transitions. Physical Review Letters, 124(21), 218002-. doi:10.1103/PhysRevLett.124.218002 0031-9007 https://hdl.handle.net/10356/145015 10.1103/PhysRevLett.124.218002 32530644 21 124 en MOE2017-T2-1-066 Physical Review Letters © 2020 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society. application/pdf |
| spellingShingle | Physics - Soft Condensed Matter Physics - Soft Condensed Matter Physics - Statistical Mechanics Science::Physics Attraction Two-dimensional Li, Yan-Wei Ciamarra, Massimo Pica Attraction tames two-dimensional melting : from continuous to discontinuous transitions |
| title | Attraction tames two-dimensional melting : from continuous to discontinuous transitions |
| title_full | Attraction tames two-dimensional melting : from continuous to discontinuous transitions |
| title_fullStr | Attraction tames two-dimensional melting : from continuous to discontinuous transitions |
| title_full_unstemmed | Attraction tames two-dimensional melting : from continuous to discontinuous transitions |
| title_short | Attraction tames two-dimensional melting : from continuous to discontinuous transitions |
| title_sort | attraction tames two dimensional melting from continuous to discontinuous transitions |
| topic | Physics - Soft Condensed Matter Physics - Soft Condensed Matter Physics - Statistical Mechanics Science::Physics Attraction Two-dimensional |
| url | https://hdl.handle.net/10356/145015 |
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