Atomic scale 0-pi transition in a high-Tc superconductor/ferromagnetic-insulator/high-T superconductor Josephson junction

Shiro Kawabata; Yukio Tanaka; Yasuhiro Asano

doi:10.1016/j.physe.2010.07.038

Atomic scale 0-pi transition in a high-Tc superconductor/ferromagnetic-insulator/high-T superconductor Josephson junction

Superconductivity 2015-05-27 v1 Mesoscale and Nanoscale Physics Quantum Physics

Authors: Shiro Kawabata , Yukio Tanaka , Yasuhiro Asano

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Abstract

We study the Josephson transport in a high-Tc superconductor/ferromagnetic-insulator(FI)/high-Tc superconductor numerically. We found the formation of a pi-junction in such systems. More remarkably the ground state of such junction alternates between 0- and pi-states when thickness of FI is increasing by a single atomic layer. We propose an experimental setup for observing the atomic-scale 0-pi transition. Such FI-based pi-junctions can be used to implement highly-coherent quantum bits.

Keywords

josephson junction pi-junction high-tc superconductor ferromagnetic insulator 0-pi transition quantum bit

Cite

@article{arxiv.1103.2187,
  title  = {Atomic scale 0-pi transition in a high-Tc superconductor/ferromagnetic-insulator/high-T superconductor Josephson junction},
  author = {Shiro Kawabata and Yukio Tanaka and Yasuhiro Asano},
  journal= {arXiv preprint arXiv:1103.2187},
  year   = {2015}
}

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4 pages, 3 figures

Atomic scale 0-pi transition in a high-Tc superconductor/ferromagnetic-insulator/high-T superconductor Josephson junction

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