Fragile-to-strong glass transition in two-dimensional vortex liquids
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910873355812864 |
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| author | Maccari, Ilaria Benfatto, Lara Castellani, Claudio Lorenzana, José De Michele, Cristiano |
| author_facet | Maccari, Ilaria Benfatto, Lara Castellani, Claudio Lorenzana, José De Michele, Cristiano |
| contents | The fragile-to-strong glass transition is a fascinating phenomenon that still presents many theoretical and experimental challenges. A major one is how to tune the fragility of a glass-forming liquid. Here, we study a two-dimensional (2D) system composed of vortices in a superconducting film, which effectively behaves as a 2D glass-forming liquid. We show that the kinetic fragility in this system can be experimentally varied by tuning a single parameter: the external magnetic field $H$ applied transversely to the film. This conclusion is supported by the direct comparison between the analysis of experimental measurements in an amorphous MoGe superconducting film and Monte Carlo simulations in a disordered XY model, that captures the universality class of the two-step melting transition. We show that by increasing disorder strength a fragile-to-strong transition is induced, in close similarity with the experimental findings in a magnetic field. Our numerical results shed light on the evolution of the dynamical heterogeneity from a fragile to strong glass, as due to the subtle interplay between caging effects arising from hexatic order and strong random pinning. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_14985 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fragile-to-strong glass transition in two-dimensional vortex liquids Maccari, Ilaria Benfatto, Lara Castellani, Claudio Lorenzana, José De Michele, Cristiano Superconductivity Soft Condensed Matter Strongly Correlated Electrons The fragile-to-strong glass transition is a fascinating phenomenon that still presents many theoretical and experimental challenges. A major one is how to tune the fragility of a glass-forming liquid. Here, we study a two-dimensional (2D) system composed of vortices in a superconducting film, which effectively behaves as a 2D glass-forming liquid. We show that the kinetic fragility in this system can be experimentally varied by tuning a single parameter: the external magnetic field $H$ applied transversely to the film. This conclusion is supported by the direct comparison between the analysis of experimental measurements in an amorphous MoGe superconducting film and Monte Carlo simulations in a disordered XY model, that captures the universality class of the two-step melting transition. We show that by increasing disorder strength a fragile-to-strong transition is induced, in close similarity with the experimental findings in a magnetic field. Our numerical results shed light on the evolution of the dynamical heterogeneity from a fragile to strong glass, as due to the subtle interplay between caging effects arising from hexatic order and strong random pinning. |
| title | Fragile-to-strong glass transition in two-dimensional vortex liquids |
| topic | Superconductivity Soft Condensed Matter Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.14985 |