Vortices in layered superconductors with Josephson coupling

Bulaevskiǐ, L. N.; Ledvij, M.; Kogan, V. G.

doi:10.1103/physrevb.46.366

Cited by 299 publications

(192 citation statements)

References 27 publications

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“…It was already proved by experiments on HTSCs with moderate (Y-Ba-Cu-O) and strong (Ba-Bi-Ca-Cu-O and Tl-superconductors) anisotropy [12,13]. The compound under present study is a classic London superconductor [22], as the magnetic field penetration depth l in it sufficiently exceeds its coherence length x (for the component of M normal to the ab plane, which is responsible for superconductivity, l ab » 1000 Å and the coherence length x c » 10 Å although it is nevertheless larger than the interlayer distance). A satisfactory agreement between the measured and calculated dependences is observed in a limited low-field range.…”

Section: Discussion Of Experimental Resultsmentioning

confidence: 89%

On the transverse magnetization of the anisotropic superconductor 2H–NbSe2

Sirenko

Makedonska

Shabakayeva

et al. 2002

Low Temperature Physics

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Torque measurements were performed on a high-quality single crystal of the uniaxial superconductor 2H-NbSe 2 in a tilted magnetic field 0-200 kG, in the temperature range 1.5-4.2 K. The transverse component of the absolute magnetization was derived in a magnetic field directed at an angle of 77°to the axis of anisotropy, and its field dependence was analyzed in a reversible domain of the mixed state. The penetration depth and anisotropy characteristics were obtained for the sample under study.

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Section: Discussion Of Experimental Resultsmentioning

confidence: 89%

On the transverse magnetization of the anisotropic superconductor 2H–NbSe2

Sirenko

Makedonska

Shabakayeva

et al. 2002

Low Temperature Physics

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“…Such a structure with normal flux pancakes moving inside the sample along the in-plane Josephson-like strings (Fig. 9b) is preferred in layered superconductors under tilted fields with moderate B ⊥ ( [34][35][36]29]) and can be realized in our case. The attractive coupling between pancakes and Josephson vortices [37] assists "sliding" of the pancake stacks along the in-plane field and lowers the regular pinning potential.…”

Section: H || Parallel To the Long Edgesmentioning

confidence: 80%

Flux cutting in high-Tcsuperconductors

et al. 2015

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We performed magneto-optical study of flux distributions in a YBCO crystal under various applied crossed-field orientations to elucidate the complex nature of magnetic flux cutting in superconductors. Our study reveals unusual vortex patterns induced by the interplay between flux-cutting and vortex pinning. We observe strong flux penetration anisotropy of the normal flux B ⊥ in the presence of an in-plane field H || and associate the modified flux dynamics with staircase structure of tilted vortices in YBCO and the flux-cutting process.We demonstrate that flux-cutting can effectively delay vortex entry in the direction transverse to H || . Finally, we elucidate details of the vortex-cutting and reconnection process using time-dependent Ginzburg-Landau simulations.

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“…Speculations of such a configuration go back over a decade [30,31], and indeed, a connection between the observation of chains in BSCCO [32] and the crossing-lattice state was made by Huse [33]. A more quantitative picture emerged after the work of Koshelev [34], where the distortions from simple straight crossing lattices were first calculated.…”

Section: Theory Of Interacting Crossing Latticesmentioning

confidence: 99%

Vortex chains in anisotropic superconductors

Bending¹,

Dodgson²

2005

J. Phys.: Condens. Matter

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High-cT superconductors in small magnetic fields directed away from the crystal symmetry axes have been found to exhibit inhomogeneous chains of flux lines (vortices), in contrast to the usual regular triangular flux-line lattice. We review the experimental observations of these chains, and summarize the theoretical background that explains their appearance. We treat separately two classes of chains: those that appear in superconductors with moderate anisotropy due to an attractive part of the interaction between tilted flux lines, and those with high anisotropy where the tilted magnetic flux is created by two independent and perpendicular crossing lattices. In the second case it is the indirect attraction between a flux line along the layers (Josephson vortex) and a flux line perpendicular to the layers (pancake vortex stack) that leads to the formation of chains of the pancake vortex stacks. This complex system contains a rich variety of phenomena, with several different equilibrium phases, and an extraordinary dynamic interplay between the two sets of crossing vortices. We compare the theoretical predictions of these phenomena with the experimental observations made to date. We also contrast the different techniques used to make these observations. While it is clear that this system forms a wonderful playground for probing the formation of structures with competing interactions, we conclude that there are important practical implications of the vortex chains that appear in highly anisotropic superconductors.

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Vortices in layered superconductors with Josephson coupling

Cited by 299 publications

References 27 publications

On the transverse magnetization of the anisotropic superconductor 2H–NbSe2

On the transverse magnetization of the anisotropic superconductor 2H–NbSe2

Flux cutting in high-Tcsuperconductors

Vortex chains in anisotropic superconductors

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