Anomalous Josephson effect induced by spin-orbit interaction and Zeeman effect in semiconductor nanowires
By T. Yokoyama, M. Eto, Yuli V. Nazarov. 2014
178 citations recorded by the source corpus.
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 ? 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-? 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(??)?En(?), where the anomalous Josephson current flows even at ?=0. In addition, the direction dependence of critical current is observed, in accordance with experimental results.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/261a3cd37dba726a9b2632c2ad9915de0f06ccaa
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Josephson ϕ0-junction in nanowire quantum dots (2015, background): “main experimental observations can be summarized as follows: (1) the observed shift in the SQUID pattern occurs for a finite in-plane magnetic field which exact value depends on the QD configuration; (2) the shift in pattern occurs mainly for gate values at which the QD electron occupation number ch”