Super-current profile in an Al flat at zero magnetic field
Perfil de súper-corrientes en una lámina de Al a campo magnético cero
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Objective: This paper presents numerical results of computational simulations of the Supercurrent profile in a superconducting aluminum flat at low temperature, aiming to be analyzed for the fabrication of nanostructures for possible applications in nanoelectronics devices. Methodology: Time dependent Ginzburg-Landau equations were solved with the popular Link variable method for aluminum flat with a direct applied current and in absence of external applied magnetic field. Results: Kinematics vortex pairs emerge of the middle part of the sample and a subsequent annihilation in a determined value for the applied current. The periodic vortex kinematic pair nucleation leads to the appearance of temporal voltage oscillations. At higher current, the superconducting state is completely destroyed and the sample behaves as a ohmic metal. At lower current a low resistance is present due to metallic contact where the current is applied. Conclusion: The appearance of vortex-anti-vortex pairs destroys the superconducting state in the middle of the sheet. Its nature is determined by the supercurrent profile within the sample. Kinematic vortex shows an elongated geometry causing a drastic increase in local resistance of the material.
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