Superconducting nanowires: quantum-confinement effect on the critical magnetic field and supercurrent
Faculty of Sciences. Physics
Singapore :World Scientific, 2010
Proceedings 32nd International Workshop on Condensed Matter Theories, August 12-19, 2008, Loughborough, England / Kusmartsev, F. [edit.]
University of Antwerp
We study the effect, of electron confinement on the superconducting-to-normal phase transition driven by a magnetic field and/or on the current-carrying state of the superconducting condensate in nanowires. Our investigation is based on a self-consistent. numerical solution of the Bogoliubov-de Gennes equations. We show that, in a parallel magnetic field and/or in the presence of supercurrent the transition from superconducting to normal phase occurs as a cascade of discontinuous jumps in the superconducting order parameter for diameters D < 10 divided by 15 nm at T = 0. The critical magnetic held exhibits quantum-size oscillations with pronounced resonant enhancements.