Order-Disorder Transitions and Thermal Pathways in Frustrated 2D Colloidal Crystals
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866916908633161728 |
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| author | Vargas, Alexandre Puccinelli, Thiago Bordin, José Rafael |
| author_facet | Vargas, Alexandre Puccinelli, Thiago Bordin, José Rafael |
| contents | We employ extensive NPT molecular dynamics simulations to explore the thermal transitions of two-dimensional colloidal crystals interacting via a core-softened potential with competing length scales. The system stabilizes three distinct solid phases, namely low-density triangular (LDT), stripe, and kagome, which exhibit markedly different responses to heating and cooling. Our simulations reveal that the LDT and kagome phases melt via first-order transitions, but only the former recrystallizes smoothly. The kagome phase displays strong hysteresis and metastability, while the stripe phase undergoes a continuous and nearly reversible transformation. These results highlight the role of lattice geometry and frustration in shaping non-universal melting and freezing pathways in 2D soft matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_13918 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Order-Disorder Transitions and Thermal Pathways in Frustrated 2D Colloidal Crystals Vargas, Alexandre Puccinelli, Thiago Bordin, José Rafael Soft Condensed Matter We employ extensive NPT molecular dynamics simulations to explore the thermal transitions of two-dimensional colloidal crystals interacting via a core-softened potential with competing length scales. The system stabilizes three distinct solid phases, namely low-density triangular (LDT), stripe, and kagome, which exhibit markedly different responses to heating and cooling. Our simulations reveal that the LDT and kagome phases melt via first-order transitions, but only the former recrystallizes smoothly. The kagome phase displays strong hysteresis and metastability, while the stripe phase undergoes a continuous and nearly reversible transformation. These results highlight the role of lattice geometry and frustration in shaping non-universal melting and freezing pathways in 2D soft matter. |
| title | Order-Disorder Transitions and Thermal Pathways in Frustrated 2D Colloidal Crystals |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2508.13918 |