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Field-induced p-wave Superconductivity in Mesoscopic Systems

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If you have a question about this talk, please contact Dr G Moller .

By using Bogoliubov-de Gennes (BdG) equations, we study superconducting (SC) states in a quasi 2-dimensional system of radius $R$. It is shown that no vortices exist in s-wave SC samples with $R smaller R_c ~ xi(0)$, the T=0 coherence length. We predict that chiral p-wave states exhibit superconductivity for $R smaller R_c$ only in the presence of a vortex with opposite chirality. This induced SC phase is a consequence of non-zero chirality of the pairing order parameter and implies the presence of chiral edge currents. Our study may be applied to sharply probing the pairing symmetry of unconventional superconductors.

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