Giant vortices, rings of vortices, and reentrant behavior in type-1.5 superconductors

V. H. Dao; L. F. Chibotaru; T. Nishio; V. V. Moshchalkov

doi:10.1103/PhysRevB.83.020503

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Giant vortices, rings of vortices, and reentrant behavior in type-1.5 superconductors

V. H. Dao, L. F. Chibotaru, T. Nishio, V. V. Moshchalkov

DOI 10.1103/PhysRevB.83.020503 · Physical Review B

T1

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Abstract

We predict that in a bulk type-1.5 superconductor, the competing magnetic responses of the two components of the order parameter can result in group-stabilized giant vortices and individual rings of vortices in the absence of any extrinsic pinning or confinement mechanism. We also determine within the Ginzburg-Landau theory a condition for the robustness of type 1.5 in the vicinity of the critical temperature, and we find a rich phase diagram with successions of behaviors such as type 1→ type 1.5→ type 2→ type 1.5 when temperature decreases.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown