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arXiv · 1108.2380

Field-induced p-wave Superconductivity in Mesoscopic Systems

Jia-Wei Huo·Wei-Qiang Chen·S. Raghu·Fu-Chun Zhang
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Abstract

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 $R<R_\text{c}\simξ(0)$, the T=0 coherence length. We predict that chiral p-wave states exhibit superconductivity for $R<R_\text{c}$ only in the presence of a vortex with opposite chirality. This {\it 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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Jia-Wei Huo, Wei-Qiang Chen, S. Raghu, Fu-Chun Zhang. 2012-07-14. Field-induced p-wave Superconductivity in Mesoscopic Systems. https://doi.org/10.1103/physrevlett.108.257002

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