Abstract
The phase diagram of a two-dimensional vortex system with periodic square columnar pins is studied. For the case of vortex number matching pinning number, we find two scenarios for the freezing transitions. For weak pinning where vortex–vortex interactions dominate, the vortex liquid is frozen into triangular lattice via a first-order phase transition. For strong pinning, the vortex liquid is frozen into a square lattice with all vortices trapped by pins via a second-order phase transition.
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Lai, TW., Luo, MB. Phase Diagram of Vortices in Type-II Superconductors with Periodic Square Columnar Pins. J Supercond Nov Magn 23, 1059–1061 (2010). https://doi.org/10.1007/s10948-010-0722-z
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DOI: https://doi.org/10.1007/s10948-010-0722-z