Physics – Condensed Matter – Superconductivity
Scientific paper
2009-08-20
Physics
Condensed Matter
Superconductivity
4 pages, 3 figures. Submitted paper
Scientific paper
Using the time-dependent Ginzburg-Landau equation with the complex relaxation time and the Maxwell equation, we systematically examine transverse motion of vortex dynamics in the presence of pinning disorders. Consequently, in a plastic flow phase in which moving and pinned vortices coexist, we find that the Hall voltage generally changes its sign. The origin of the sign change is ascribed to a fact that moving vortices are strongly drifted by circular current of pinned vortices and the enforced transverse moving direction becomes opposite to that by transport current. This suggests that the Hall sign change is a behavior common in all disordered type-II superconductors.
Hayashi Nobuhiko
Machida Mami
Nakai Noriyuki
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