Gurin, Péter and Varga, Szabolcs and Odriozola, Gerardo (2020) Three-step melting of hard superdisks in two dimensions. PHYSICAL REVIEW E: COVERING STATISTICAL NONLINEAR BIOLOGICAL AND SOFT MATTER PHYSICS (2016-), 102 (6). ISSN 2470-0045
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Abstract
We explore the link between the melting scenarios of two-dimensional systems of hard disks and squares through replica-exchange Monte Carlo simulations of hard superdisks. The well-known melting scenarios are observed in the disk and square limits, while we observe an unusual three-step scenario for dual-shapes. We find that two mesophases mediate the melting: a hexatic phase and another fluid phase with a D 2 local symmetry, we call it rhombatic, where both bond and particle orientational orders are quasi-long-range. Our results show that not only can the melting process of liquid-crystal forming molecules be complicated, where elongated shapes stabilize several mesophases, but also that of anisotropic quasispherical molecules.
| Item Type: | Article |
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| Uncontrolled Keywords: | 2D Melting, Mesophases, Monte Carlo simulations, Superdisks phase diagram |
| Subjects: | Q Science / természettudomány > QC Physics / fizika > QC03 Heat. Thermodinamics / hőtan, termodinamika Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika Q Science / természettudomány > QD Chemistry / kémia > QD02 Physical chemistry / fizikai kémia |
| Depositing User: | Professor Dezső Boda |
| Date Deposited: | 09 Nov 2023 13:01 |
| Last Modified: | 09 Nov 2023 13:01 |
| URI: | http://real.mtak.hu/id/eprint/179435 |
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