Jami, P and Chaudhuri, P and Dasgupta, C and Ghosal, A (2024) Effect of disorder on phases across two-dimensional thermal melting. In: Physical Review E, 109 (6).
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Abstract
We study melting in a two-dimensional system of classical particles with Gaussian-core interactions in disordered environments. The pure system validates the conventional two-step melting with a hexatic phase intervening between the solid and the liquid. This picture is modified in the presence of pinning impurities. A random distribution of pinning centers forces a hexaticlike low-temperature phase that transits into a liquid at a single melting temperature TmRP. In contrast, pinning centers located at randomly chosen sites of a perfect crystal anchor a solid at low temperatures which undergoes a direct transition to the liquid at TmCP. Thus, the two-step melting is lost in either case of disorder. We discuss the characteristics of melting depending on the nature of the impurities. © 2024 American Physical Society.
| Item Type: | Journal Article |
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| Publication: | Physical Review E |
| Publisher: | American Physical Society |
| Additional Information: | The copyright for this article belongs to authors. |
| Keywords: | Crystal impurities; Temperature, Classical particle; Core interactions; Gaussian cores; Hexatic phase; Low temperature phase; Pinning centres; Random distribution; Thermal melting; Two-dimensional; Two-dimensional systems, Melting |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 17 Aug 2024 11:58 |
| Last Modified: | 17 Aug 2024 11:58 |
| URI: | http://eprints.iisc.ac.in/id/eprint/85456 |
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