Thermal fluctuations and vortex lattice structures in chiral -wave superconductors: robustness of double-quanta vortices
arXiv:2007.09161 · doi:10.1103/PhysRevB.103.214517
Abstract
We use large-scale Monte-Carlo simulations to study thermal fluctuations in chiral -wave superconductors in an applied magnetic field in three dimensions. We consider the thermal stability of previously predicted unusual double-quanta flux-line lattice ground states in such superconductors. In previous works it was shown that, neglecting thermal fluctuations, a chiral -wave superconductor forms an hexagonal lattice of doubly-quantized vortices, except extremely close to the vicinity of where double-quanta vortices split apart. We find dissociation of double-quanta vortices driven by thermal fluctuations. However, our calculations also show that the previous predictions of hexagonal doubly-quantized vortices, where thermal fluctuations were ignored, are very robust in the considered model.
arXiv comment21 pages, 12 figures, submitted to Physical Review B
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