Journal
NEW JOURNAL OF PHYSICS
Volume 20, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/aaa472
Keywords
superconducting vortex; anisotropic interactions; structural transitions
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Funding
- Notre Dame Center for Research Computing
- US Department of Energy, Office of Basic Energy Sciences [DE-SC0005051]
- NNSA of the US DoE at LANL [DE-AC52-06NA25396]
- U.S. Department of Energy (DOE) [DE-SC0005051] Funding Source: U.S. Department of Energy (DOE)
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We introduce a model of vortices in type-II superconductors with a four-fold anisotropy in the vortex-vortex interaction potential. Using numerical simulations we show that the vortex lattice undergoes structural transitions as the anisotropy is increased, with a triangular lattice at low anisotropy, a rhombic intermediate state, and a square lattice for high anisotropy. In some cases we observe a multi-q state consisting of an Archimedean tiling that combines square and triangular local ordering. At very high anisotropy, domains of vortex chain states appear. Wediscuss how this model can be generalized to higher order anisotropy as well as its applicability to other particle-based systems with anisotropic particle-particle interactions.
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