1. Thermal fluctuations and vortex lattice structures in chiral p -wave superconductors: Robustness of double-quanta vortices
- Author
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Egor Babaev, Håvard Homleid Haugen, Julien Garaud, Asle Sudbø, Fredrik Nicolai Krohg, Department of Physics [Trondheim] (Physics NTNU), Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU), Center for Quantum Spintronics (QuSpin), Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology [Trondheim] (NTNU), Department of Physics [Stockholm], Royal Institute of Technology [Stockholm] (KTH ), Institut Denis Poisson (IDP), Centre National de la Recherche Scientifique (CNRS)-Université de Tours (UT)-Université d'Orléans (UO), Supported by an NTNU University Grant, the Research Council of Norway Project No. 250985 'Fundamentals of Low-dissipative Topological Matter', and the Research Council of Norway through its Centres of Excellence funding scheme, Project No. 262633,'QuSpin'. E.B. was supported by the Swedish Research Council Grants No. 642-2013-7837, 2016-06122, 2018-03659, andGöran Gustafsson Foundation for Research in Natural Sciences and Medicine and Olle Engkvists Stiftelse. We acknowledge support from the Norwegian High-Performance Computing Consortium NOTUR, Project NN2819K., and Centre National de la Recherche Scientifique (CNRS)-Université de Tours-Université d'Orléans (UO)
- Subjects
Superconductivity ,Physics ,Condensed matter physics ,Condensed matter physics: 436 [VDP] ,Condensed Matter - Superconductivity ,FOS: Physical sciences ,Thermal fluctuations ,Crystal structure ,Topological phase transitions ,01 natural sciences ,010305 fluids & plasmas ,Vortex ,Magnetic field ,Superconductivity (cond-mat.supr-con) ,[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] ,Kondenserte fasers fysikk: 436 [VDP] ,Condensed Matter::Superconductivity ,Lattice (order) ,0103 physical sciences ,Topologiske faseoverganger ,Thermal stability ,Hexagonal lattice ,Ukonvensjonell superledning ,010306 general physics ,Unconventional superconductivity - 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 an 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., Comment: 21 pages, 12 figures, submitted to Physical Review B
- Published
- 2021