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Thermal fluctuations and vortex lattice structures in chiral p-wave superconductors: Robustness of double-quanta vortices

Abstract : We use large-scale Monte-Carlo simulations to study thermal fluctuations in chiral $p$-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 $p$-wave superconductor forms a hexagonal lattice of doubly-quantized vortices, except extremely close to the vicinity of ${H}_{c2}$ 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.
Document type :
Journal articles

https://hal.archives-ouvertes.fr/hal-03269957
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Submitted on : Thursday, June 24, 2021 - 2:29:11 PM
Last modification on : Friday, April 1, 2022 - 3:49:30 AM

Citation

Fredrik Nicolai Krohg, Egor Babaev, Julien Garaud, Håvard Homleid Haugen, Asle Sudbø. Thermal fluctuations and vortex lattice structures in chiral p-wave superconductors: Robustness of double-quanta vortices. Physical Review B, American Physical Society, 2021, 103 (21), pp.214517. ⟨10.1103/PhysRevB.103.214517⟩. ⟨hal-03269957⟩

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