Phase diagram of vortex matter of type-II superconductors

X. B. Xu; H. Fangohr; S. Y. Ding; F. Zhou; X. N. Xu; Z. H. Wang; M. Gu; D. Q. Shi; S. X. Dou

doi:10.1103/PhysRevB.83.014501

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Phase diagram of vortex matter of type-II superconductors

X. B. Xu, H. Fangohr, S. Y. Ding, F. Zhou, X. N. Xu, Z. H. Wang, M. Gu, D. Q. Shi, S. X. Dou

DOI 10.1103/PhysRevB.83.014501 · Physical Review B

T1

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Abstract

We propose a model to construct the phase diagram for type-II superconductors through molecular-dynamics simulation. In this model, the Abrikosov vortices interact with long-range repulsion and short-range attraction. We are able to obtain the phase diagrams consisting of the vortex lattice, the intermediate-mixed phase (IMP), and the disordered vortex phase in the B-T, B-κ, and B-q planes, where B is induction, κ is the Ginzburg-Landau parameter, and q is the relative strength of the attraction to repulsion interactions between vortices. The IMP is in the form of a superlattice of either vortex bubbles or parallel vortex stripes, agreeing excellently with experimental results that have not yet been explained by existing models.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tc Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown