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

Tomohiro Yokoyama, Mikio Eto, Yuli V. Nazarov

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number052035
JournalJournal of Physics: Conference Series
Volume568
DOIs
Publication statusPublished - 2014
Event27th International Conference on Low Temperature Physics, LT 2014 - Buenos Aires, Argentina
Duration: 2014 Aug 62014 Aug 13

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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