Spontaneous superconducting islands and Hall voltage in clean superconductors

Details Spontaneous superconducting islands and Hall voltage in clean superconductors Spontaneous superconducting islands and Hall voltage in clean superconductors

2004-09-10

arxiv.org/abs/cond-mat/0409259v2

Phys. Rev. B 71, 174504 (2005)

Physics

Condensed Matter

Superconductivity

6 pages, Includes additional cases and more detailed results

Scientific paper

10.1103/PhysRevB.71.174504

We study a clean superconductor in the Hall configuration, in the framework of a purely dissipative time-dependent Ginzburg--Landau theory. We find situations in which the order parameter differs significantly from zero in a set of islands that appear to form a periodic structure. When the pattern of islands becomes irregular, it moves in or against the direction of the current and a Hall voltage is found. Tiny differences in the initial state may reverse the sign of the Hall voltage. When the average Hall voltage vanishes, the local Hall voltage does not necessarily vanish. We examine the influence that several boundary conditions at the electrodes have on these effects.

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