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Vortices with Fractional Flux Quanta in Multi-Band Superconductors

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Abstract

In superconductors with three or more components, time-reversal symmetry may be broken when the inter-component couplings are repulsive, leading to a superconducting state with twofold degeneracy. When prepared carefully, there is a stable domain wall on a constriction which connects two bulks in states with opposite chiralities. Applying external magnetic field, vortices in different components dissociate with each other, resulting in a ribbon shape distribution of magnetic field at the domain wall.

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Acknowledgments

The authors are grateful to Q. F. Liang, Z. Wang and Y. Takahashi for fruitful discussions. This work was supported by the WPI initiative on Materials Nanoarchitectonics, and by the Grant-in-Aid for Scientific Research (No. 25400385), the Ministry of Education, Culture, Sports, Science and Technology of Japan.

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Authors and Affiliations

  1. International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, 305-0044, Japan

    Zhao Huang & Xiao Hu

  2. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, 305-8571, Japan

    Zhao Huang & Xiao Hu

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  1. Zhao Huang
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  2. Xiao Hu
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Correspondence to Zhao Huang.

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Huang, Z., Hu, X. Vortices with Fractional Flux Quanta in Multi-Band Superconductors. J Supercond Nov Magn 29, 597–600 (2016). https://doi.org/10.1007/s10948-015-3309-x

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  • DOI: https://doi.org/10.1007/s10948-015-3309-x

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