Chiral symmetry breaking and the Josephson current in a ballistic superconductor-quantum wire-superconductor junction

Автор(и)

  • I.V. Krive Department of Applied Physics, Chalmers University of Technology and Göteborg University SE-412 96 Göteborg, Sweden
  • L.Y. Gorelik Department of Applied Physics, Chalmers University of Technology and Göteborg University SE-412 96 Göteborg, Sweden
  • R.I. Shekhter Department of Applied Physics, Chalmers University of Technology and Göteborg University SE-412 96 Göteborg, Sweden
  • M. Jonson Department of Applied Physics, Chalmers University of Technology and Göteborg University SE-412 96 Göteborg, Sweden

DOI:

https://doi.org/10.1063/1.1739160

Ключові слова:

PACS: 74.80.Fp, 31.30.Gs, 71.70.Ej, 73.20.Dx

Анотація

We evaluate the Josephson current through a quasi-1D quantum wire coupled to bulk superconductors. It is shown that the interplay of Rashba spin–orbit interaction and Zeeman splitting results in the appearence of a Josephson current even in the absence of any phase difference between the superconductors. In a transparent junction (D ≃ 1) at low temperatures this anomalous supercurrent Jan appears abruptly for a Zeeman splitting of the order of the Andreev level spacing as the magnetic field is varied. In a low transparency (D << 1) junction one has Jan µ Ö D̅ under special (resonance) conditions. In the absence of Zeeman splitting the anomalous supercurrent disappears. We have investigated the influence of dispersion asymmetry induced by the Rashba interaction in quasi-1D quantum wires on the critical Josephson current and have shown that the breakdown of chiral symmetry enhances the supercurrent.

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Опубліковано

2004-03-24

Як цитувати

(1)
Krive, I.; Gorelik, L.; Shekhter, R.; Jonson, M. Chiral Symmetry Breaking and the Josephson Current in a Ballistic Superconductor-Quantum Wire-Superconductor Junction. Fiz. Nizk. Temp. 2004, 30, 535-543.

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