Melting and re-entrant melting of polydisperse hard disks
Because of long-wavelength fluctuations, the nature of solids and phase transitions in 2D are different from those in 3D systems, and have been heavily debated in past decades, in which the focus was on the existence of hexatic phase. Here, by using large scale computer simulations, we investigate t...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/137593 |
| _version_ | 1811686874940440576 |
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| author | Ruiz, Sampedro Pablo Lei, Qun-Li Ni, Ran |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Ruiz, Sampedro Pablo Lei, Qun-Li Ni, Ran |
| author_sort | Ruiz, Sampedro Pablo |
| collection | NTU |
| description | Because of long-wavelength fluctuations, the nature of solids and phase transitions in 2D are different from those in 3D systems, and have been heavily debated in past decades, in which the focus was on the existence of hexatic phase. Here, by using large scale computer simulations, we investigate the melting transition in 2D systems of polydisperse hard disks. We find that, with increasing the particle size polydispersity, the melting transition can be qualitatively changed from the recently proposed two-stage process to the Kosterlitz-Thouless-Halperin-Nelson-Young scenario with significantly enlarged stability range for hexatic phase. Moreover, re-entrant melting transitions are found in high density systems of polydisperse hard disks, which were proven impossible in 3D polydisperse hard-sphere systems. These suggest a new fundamental difference between phase transitions in polydisperse systems in 2D and 3D. |
| first_indexed | 2024-10-01T05:07:21Z |
| format | Journal Article |
| id | ntu-10356/137593 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:07:21Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1375932023-12-29T06:48:48Z Melting and re-entrant melting of polydisperse hard disks Ruiz, Sampedro Pablo Lei, Qun-Li Ni, Ran School of Chemical and Biomedical Engineering Engineering::Chemical engineering Colloids Phase Transitions and Critical Phenomena Because of long-wavelength fluctuations, the nature of solids and phase transitions in 2D are different from those in 3D systems, and have been heavily debated in past decades, in which the focus was on the existence of hexatic phase. Here, by using large scale computer simulations, we investigate the melting transition in 2D systems of polydisperse hard disks. We find that, with increasing the particle size polydispersity, the melting transition can be qualitatively changed from the recently proposed two-stage process to the Kosterlitz-Thouless-Halperin-Nelson-Young scenario with significantly enlarged stability range for hexatic phase. Moreover, re-entrant melting transitions are found in high density systems of polydisperse hard disks, which were proven impossible in 3D polydisperse hard-sphere systems. These suggest a new fundamental difference between phase transitions in polydisperse systems in 2D and 3D. ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Published version 2020-04-03T04:53:38Z 2020-04-03T04:53:38Z 2019 Journal Article Ruiz, P. S., Lei, Q.-L., & Ni, R. (2019). Melting and re-entrant melting of polydisperse hard disks. Communications Physics, 2, 70-. doi:10.1038/s42005-019-0172-2 2399-3650 https://hdl.handle.net/10356/137593 10.1038/s42005-019-0172-2 2-s2.0-85071189170 2 en Communications Physics © 2019 The Author(s) (published by Springer Nature). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. application/pdf |
| spellingShingle | Engineering::Chemical engineering Colloids Phase Transitions and Critical Phenomena Ruiz, Sampedro Pablo Lei, Qun-Li Ni, Ran Melting and re-entrant melting of polydisperse hard disks |
| title | Melting and re-entrant melting of polydisperse hard disks |
| title_full | Melting and re-entrant melting of polydisperse hard disks |
| title_fullStr | Melting and re-entrant melting of polydisperse hard disks |
| title_full_unstemmed | Melting and re-entrant melting of polydisperse hard disks |
| title_short | Melting and re-entrant melting of polydisperse hard disks |
| title_sort | melting and re entrant melting of polydisperse hard disks |
| topic | Engineering::Chemical engineering Colloids Phase Transitions and Critical Phenomena |
| url | https://hdl.handle.net/10356/137593 |
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