### 抄録

We study theoretically the critical current in semiconductor nanowire Josephson junction with strong spin-orbit interaction. The critical current oscillates with an external magnetic field. We reveal that the oscillation of critical current depends on the orientation of magnetic field in the presence of spin-orbit interaction. We perform a numerical simulation using a tight-binding model. The Andreev levels are calculated as a function of phase difference ψ between two superconductors. The DC Josephson current is evaluated from the Andreev levels in the case of short junctions. The spin-orbit interaction induces the effective magnetic field. When the external field is parallel with the effective one, the critical current oscillates accompanying the 0-π like transition at the cusp of critical current. The distance of cusps increases gradually with increasing of the angle between the external and effective fields. The magnetic anisotropy of critical current is attributed to the spin precession due to the spin-orbit interaction.

元の言語 | English |
---|---|

記事番号 | 052035 |

ジャーナル | Journal of Physics: Conference Series |

巻 | 568 |

DOI | |

出版物ステータス | Published - 2014 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)

### これを引用

*Journal of Physics: Conference Series*,

*568*, [052035]. https://doi.org/10.1088/1742-6596/568/5/052035

**Critical current in semiconductor nanowire Josephson junctions in the presence of magnetic field.** / Yokoyama, Tomohiro; Eto, Mikio; Nazarov, Yuli V.

研究成果: Article

*Journal of Physics: Conference Series*, 巻. 568, 052035. https://doi.org/10.1088/1742-6596/568/5/052035

}

TY - JOUR

T1 - Critical current in semiconductor nanowire Josephson junctions in the presence of magnetic field

AU - Yokoyama, Tomohiro

AU - Eto, Mikio

AU - Nazarov, Yuli V.

PY - 2014

Y1 - 2014

N2 - We study theoretically the critical current in semiconductor nanowire Josephson junction with strong spin-orbit interaction. The critical current oscillates with an external magnetic field. We reveal that the oscillation of critical current depends on the orientation of magnetic field in the presence of spin-orbit interaction. We perform a numerical simulation using a tight-binding model. The Andreev levels are calculated as a function of phase difference ψ between two superconductors. The DC Josephson current is evaluated from the Andreev levels in the case of short junctions. The spin-orbit interaction induces the effective magnetic field. When the external field is parallel with the effective one, the critical current oscillates accompanying the 0-π like transition at the cusp of critical current. The distance of cusps increases gradually with increasing of the angle between the external and effective fields. The magnetic anisotropy of critical current is attributed to the spin precession due to the spin-orbit interaction.

AB - We study theoretically the critical current in semiconductor nanowire Josephson junction with strong spin-orbit interaction. The critical current oscillates with an external magnetic field. We reveal that the oscillation of critical current depends on the orientation of magnetic field in the presence of spin-orbit interaction. We perform a numerical simulation using a tight-binding model. The Andreev levels are calculated as a function of phase difference ψ between two superconductors. The DC Josephson current is evaluated from the Andreev levels in the case of short junctions. The spin-orbit interaction induces the effective magnetic field. When the external field is parallel with the effective one, the critical current oscillates accompanying the 0-π like transition at the cusp of critical current. The distance of cusps increases gradually with increasing of the angle between the external and effective fields. The magnetic anisotropy of critical current is attributed to the spin precession due to the spin-orbit interaction.

UR - http://www.scopus.com/inward/record.url?scp=84919683984&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84919683984&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/568/5/052035

DO - 10.1088/1742-6596/568/5/052035

M3 - Article

AN - SCOPUS:84919683984

VL - 568

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

M1 - 052035

ER -