Simulation of the phase diagram of magnetic vortices in two-dimensional superconductors: evidence for vortex chain formation

Xu, Xingliang; Fangohr, Hans; Gu, Min; Chen, W; Wang, Z H; Zhou, Fang; Shi, Dongqi; Dou, S. X.

doi:10.1088/0953-8984/26/11/115702

Cited by 9 publications

(6 citation statements)

References 55 publications

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“…Let us take a more careful look at the similarities and differences between the calculated regular vortex patterns (see, e.g., [10,27,[35][36][37]) and the observed vortex patterns in multi-band superconductors [12,13,15]. The most prominent features that the numerical simulations reproduce are the formation of vortex clusters and vortex stripes.…”

Section: Introductionmentioning

confidence: 94%

Pattern formation in vortex matter with pinning and frustrated intervortex interactions

2017

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We investigate the effects related to vortex core deformations when vortices approach each other.As a result of these vortex core deformations, the vortex-vortex interaction effectively acquires an attractive component leading to a variety of vortex patterns typical for systems with nonmonotonic repulsive-attractive interaction, such as stripes, labyrinths, etc. The core deformations are anisotropic and can induce frustration in the vortex-vortex interaction. In turn, this frustration has an impact on the resulting vortex patterns, which are analyzed in the presence of additional random pinning, as a function of the pinning strength. This analysis can be applicable to vortices in multiband superconductors or to vortices in Bose-Einstein condensates.

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Section: Introductionmentioning

confidence: 94%

Pattern formation in vortex matter with pinning and frustrated intervortex interactions

2017

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“…A low-density clump phase, an intermediate density stripe phase, an anticlump phase, and a high-density uniform phase have been observed in simulations. (Dao et al, 2011;Drocco et al, 2013;Meng et al, 2014;Olson Reichhardt et al, 2010;Varney et al, 2013;Xu et al, 2011Xu et al, , 2014Zhao et al, 2012a,b) As vortices approach each other, the nonlinear effect becomes important such that the interaction between vortices may no longer be pairwise, i.e. many-body interaction such as three-body interaction becomes important.…”

Section: F Vortex With Nonmonotonic Interactionmentioning

confidence: 99%

“…The long-range repulsion between vortices due to the dipolar interaction at large separation, the short-range Xu et al 2011, Zhao et al 2012a, 2012b, Drocco et al 2013, Varney et al 2013, Meng et al 2014, Xu et al 2014. As vortices approach each other, the nonlinear effect becomes important such that the interaction between vortices may no longer be pairwise, i.e.…”

Section: Vortex With Nonmonotonic Interactionmentioning

confidence: 99%

“…attraction at intermediate separation and strong repulsion at short separation, yield complex vortex configurations in an intermediate vortex density. A low-density clump phase, an intermediate density stripe phase, an anticlump phase and a high-density uniform phase have been observed in simulations (Olson Reichhardt et al 2010, Dao et al 2011, Xu et al 2011, Zhao et al 2012a, 2012b, Drocco et al 2013,Varney et al 2013, Meng et al 2014, Xu et al 2014. As vortices approach each other, the nonlinear effect becomes important such that the interaction between vortices may no longer be pairwise, i.e.…”

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confidence: 94%

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Ground state, collective mode, phase soliton and vortex in multiband superconductors

Lin¹

2014

J. Phys.: Condens. Matter

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This article reviews theoretical and experimental work on the novel physics in multiband superconductors. Multiband superconductors are characterized by multiple superconducting energy gaps in different bands with interaction between Cooper pairs in these bands. The discovery of prominent multiband superconductors MgB2 and later iron-based superconductors, has triggered enormous interest in multiband superconductors. The most recently discovered superconductors exhibit multiband features. The multiband superconductors possess novel properties that are not shared with their single-band counterpart. Examples include: the time-reversal symmetry broken state in multiband superconductors with frustrated interband couplings; the collective oscillation of number of Cooper pairs between different bands, known as the Leggett mode; and the phase soliton and fractional vortex, which are the main focus of this review. This review presents a survey of a wide range of theoretical exploratory and experimental investigations of novel physics in multiband superconductors. A vast amount of information derived from these studies is shown to highlight unusual and unique properties of multiband superconductors and to reveal the challenges and opportunities in the research on the multiband superconductivity.

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“…8,9 Being multi-component as a rule, such superconductors can support non-monotonic interactions between vortices, leading to nonuniform vortex patterns. [10][11][12] Leggett mode and phase solitons can arise as topological defects associated with non-trivial phase difference between different components. 13,14 Furthermore, in the state with TRSB, domain walls may separate areas with different TRSB ground states.…”

Section: Introductionmentioning

confidence: 99%

Skyrmionic chains and lattices in s+id superconductors

Zhang

Zha

et al. 2020

Phys. Rev. B

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We report characteristic vortex configurations in s + id superconductors with time reversal symmetry breaking, exposed to magnetic field. A vortex in the s + id state tends to have an opposite phase winding between s− and d−wave condensates. We find that this peculiar feature together with the competition between s− and d−wave symmetry results in three distinct classes of vortical configurations. When either s− or d− condensate absolutely dominates, vortices form a conventional lattice. However, when one condensate is relatively dominant, vortices organize in chains that exhibit skyrmionic character, separating the chiral components of the s ± id order parameter into domains within and outside the chain. Such skyrmionic chains are found stable even at high magnetic field. When s− and d− condensates have a comparable strength, vortices split cores in two chiral components to form full-fledged skyrmions, i.e. coreless topological structures with an integer topological charge, organized in a lattice. We provide characteristic magnetic field distributions of all states, enabling their identification in e.g. scanning Hall probe and scanning SQUID experiments. These unique vortex states are relevant for high-Tc cuprate and iron-based superconductors, where the relative strength of competing pairing symmetries is expected to be tuned by temperature and/or doping level, and can help distinguish s + is and s + id superconducting phases. * lingfeng.zhang@uantwerpen.be † spzhou@shu.edu.cn 1 Milorad V. Milošević and Andrea Perali, "Emergent phenomena in multicomponent superconductivity: An introduction to the focus issue," Supercond. Sci. Technol. 28, 060201 (2015). 2 Masatoshi Sato and Yoichi Ando, "Topological superconductors: a review," Rep. Prog. Phys. 80, 076501 (2017). 3 Andrew Peter Mackenzie and Yoshiteru Maeno, "The superconductivity of Sr2RuO4 and the physics of spin-triplet

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Simulation of the phase diagram of magnetic vortices in two-dimensional superconductors: evidence for vortex chain formation

Cited by 9 publications

References 55 publications

Pattern formation in vortex matter with pinning and frustrated intervortex interactions

Pattern formation in vortex matter with pinning and frustrated intervortex interactions

Ground state, collective mode, phase soliton and vortex in multiband superconductors

Skyrmionic chains and lattices in s+id superconductors

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