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  • Skyrmions: Unexpected Links to Glass & High-Temperature Superconductors
    Skyrmions, tiny whirlpools of magnetic moments, have recently attracted a lot of attention due to their potential applications in spintronics and other areas of physics. Surprisingly, skyrmions share several intriguing similarities with two seemingly unrelated phenomena: glass and high-temperature superconductors.

    Similarities with Glass:

    1. Frustration and Disorder: Glass is a solid where atoms or molecules are arranged in a disordered manner, leading to frustration in the system. Similarly, skyrmions can be viewed as magnetic "quasiparticles" that arise due to frustration in the magnetic interactions between spins.

    2. Phase Transition: The transition from a normal liquid to a glassy state involves a change in the material's structure and dynamics. In the case of skyrmions, certain materials undergo a phase transition from a conventional magnetic state to a skyrmion phase as temperature or magnetic field is varied.

    3. Slow Dynamics: Glass exhibits slow relaxation dynamics due to the frustration and disorder in its atomic arrangements. Skyrmions can also exhibit slow dynamics, such as creep motion and relaxation, due to the interactions between skyrmions and their environment.

    Similarities with High-Temperature Superconductors (HTSCs):

    1. Flux Quantization: HTSCs are characterized by the quantization of magnetic flux, which means that the magnetic flux through certain regions of the material is restricted to specific discrete values. Skyrmions also exhibit flux quantization, as the magnetic moment enclosed by a skyrmion is quantized.

    2. Vortex-Like Structures: HTSCs exhibit vortex-like structures known as Abrikosov vortices, which are formed when magnetic fields penetrate the superconductor. Skyrmions can also be viewed as vortex-like structures in the spin texture, although they differ in their underlying mechanisms.

    3. Topological Protection: Both skyrmions and Abrikosov vortices are topologically protected, which means that their existence and properties are robust against certain types of perturbations. This topological protection plays a crucial role in the stability and behavior of these structures.

    These similarities between skyrmions, glass, and HTSCs highlight the rich and diverse behavior that can emerge in complex physical systems. Understanding the connections between these seemingly disparate phenomena can provide valuable insights into the fundamental principles governing their behavior and open up new avenues for exploration and potential technological applications.

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