Physics – Condensed Matter – Superconductivity
Scientific paper
2000-08-15
Physics
Condensed Matter
Superconductivity
11 pages, 14 figures, RevTex, submitted to Phys. Rev. B
Scientific paper
Self-consistent solutions of the Ginzburg-Landau system of equations, which describe the order parameter and the magnetic field distribution in a long superconducting cylinder of finite radius R, in external magnetic field H, when vortex line, carrying m flux quanta, is situated on the cylinder axis (a giant m-vortex state), are studied numerically. If the field H exceeds some critical value H_s, the giant m-vortex solution becomes unstable and passes to a new stable edge-suppressed form. The quantum number m in this state does not change, but the order parameter diminishes by a jump (almost to zero) near the cylinder surface; however, superconductivity remains in the deep, at some distance from a cylinder axis. This edge-suppressed state exist in the fields H_s
Zharkov Gelii F.
Zharkov V. G.
Zvetkov Yu. A.
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