Equilibrium phases and phase transitions in multicritical magnetic polymers
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866913724611166208 |
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| author | Raiola, Alberto Locatelli, Emanuele Marenduzzo, Davide Orlandini, and Enzo |
| author_facet | Raiola, Alberto Locatelli, Emanuele Marenduzzo, Davide Orlandini, and Enzo |
| contents | Magnetic polymers are examples of composite soft materials in which the competition between the large configurational entropy of the soft substrate (polymer) and the magnetic interaction may give rise to rich equilibrium phase diagrams as well as non-standard critical phenomena. Here, we study a self-avoiding walk model decorated by Ising spins of value $0$ and $\pm 1$ that interact according to a Blume-Emery-Griffith-like Hamiltonian. By using mean-field approximations and Monte Carlo simulations, we report the existence of three distinct equilibrium phases: swollen disordered, compact ordered, and compact disordered. Notably, these phases are separated by phase boundaries that meet at multicritical points, whose nature and location are tunable and depend on the strength of the interactions. In our conclusion, we discuss the relevance of the phase diagrams we have obtained to the physics of magnetic polymers and their application to chromatin biophysics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_05616 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Equilibrium phases and phase transitions in multicritical magnetic polymers Raiola, Alberto Locatelli, Emanuele Marenduzzo, Davide Orlandini, and Enzo Soft Condensed Matter Statistical Mechanics Magnetic polymers are examples of composite soft materials in which the competition between the large configurational entropy of the soft substrate (polymer) and the magnetic interaction may give rise to rich equilibrium phase diagrams as well as non-standard critical phenomena. Here, we study a self-avoiding walk model decorated by Ising spins of value $0$ and $\pm 1$ that interact according to a Blume-Emery-Griffith-like Hamiltonian. By using mean-field approximations and Monte Carlo simulations, we report the existence of three distinct equilibrium phases: swollen disordered, compact ordered, and compact disordered. Notably, these phases are separated by phase boundaries that meet at multicritical points, whose nature and location are tunable and depend on the strength of the interactions. In our conclusion, we discuss the relevance of the phase diagrams we have obtained to the physics of magnetic polymers and their application to chromatin biophysics. |
| title | Equilibrium phases and phase transitions in multicritical magnetic polymers |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2503.05616 |