Anomalous Josephson effect induced by spin-orbit interaction and Zeeman effect in semiconductor nanowires

Tomohiro Yokoyama, Mikio Eto, Yuli V. Nazarov

研究成果: Article査読

116 被引用数 (Scopus)

抄録

We investigate theoretically the Josephson junction of semiconductor nanowire with strong spin-orbit (SO) interaction in the presence of magnetic field. By using a tight-binding model, the energy levels En of Andreev bound states are numerically calculated as a function of phase difference φ between two superconductors in the case of short junctions. The dc Josephson current is evaluated from the Andreev levels. In the absence of SO interaction, a 0-π transition due to the magnetic field is clearly observed. In the presence of SO interaction, the coexistence of SO interaction and Zeeman effect results in En(-φ)≠En(φ), where the anomalous Josephson current flows even at φ=0. In addition, the direction dependence of critical current is observed, in accordance with experimental results.

本文言語English
論文番号195407
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
89
19
DOI
出版ステータスPublished - 2014 5 8

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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