Quasi-particle excitations around a pair of half-quantum vortices in p- wave superconductors |
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Authors: | Y Niwa M Kato K Maki |
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Institution: | 1. Department of Mathematical Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan;2. Department of Physics and Astronomy, University of Southern California, Los Angels, CA 90089-0484, USA;3. JST-CREST, 5, Sambancho, Chiyoda-ku, Tokyo 102-0075, Japan |
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Abstract: | Triplet superconductors such as Sr2RuO4 and NaxCoO2⋅yH2O are now found to be p-wave (px ± ipy) or f-wave ((px ± ipy) cos cpz) superconductors. It was phenomenologically suggested that in these p-wave or f-wave superconductors, a pair of half-quantum vortices (HQVs) becomes stable. Using the Bogoliubov-de Gennes equation, previously we have analyzed quasi-particle excitations around an HQV at one end of a d-soliton for simplicity. In next study, we will investigate the stability of the pair of HQV’s, which are connected by the d-soliton. For this purpose, we have developed a new numerical method to solve the Bogoliubov-de Gennes equation for two vortices state, using Mathieu functions. |
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Keywords: | Half-quantum vortex Triplet superconductivity Bogoliubov-de Gennes equation |
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