Fragile-to-strong glass transition in two-dimensional vortex liquids
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...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-02-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.013160 |
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| author | I. Maccari L. Benfatto C. Castellani J. Lorenzana C. De Michele |
| author_facet | I. Maccari L. Benfatto C. Castellani J. Lorenzana C. De Michele |
| author_sort | I. Maccari |
| collection | DOAJ |
| description | 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 perpendicularly 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 | Article |
| id | doaj-art-60fe451362a8412194342e0aa2fbfec7 |
| institution | OA Journals |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-60fe451362a8412194342e0aa2fbfec72025-08-20T02:13:41ZengAmerican Physical SocietyPhysical Review Research2643-15642025-02-017101316010.1103/PhysRevResearch.7.013160Fragile-to-strong glass transition in two-dimensional vortex liquidsI. MaccariL. BenfattoC. CastellaniJ. LorenzanaC. De MicheleThe 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 perpendicularly 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.http://doi.org/10.1103/PhysRevResearch.7.013160 |
| spellingShingle | I. Maccari L. Benfatto C. Castellani J. Lorenzana C. De Michele Fragile-to-strong glass transition in two-dimensional vortex liquids Physical Review Research |
| title | Fragile-to-strong glass transition in two-dimensional vortex liquids |
| title_full | Fragile-to-strong glass transition in two-dimensional vortex liquids |
| title_fullStr | Fragile-to-strong glass transition in two-dimensional vortex liquids |
| title_full_unstemmed | Fragile-to-strong glass transition in two-dimensional vortex liquids |
| title_short | Fragile-to-strong glass transition in two-dimensional vortex liquids |
| title_sort | fragile to strong glass transition in two dimensional vortex liquids |
| url | http://doi.org/10.1103/PhysRevResearch.7.013160 |
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