期刊
PHYSICAL REVIEW B
卷 89, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.195407
关键词
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资金
- Grants-in-Aid for Scientific Research [22540333] Funding Source: KAKEN
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-pi 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 E-n(-phi) not equal E-n(phi), where the anomalous Josephson current flows even at phi = 0. In addition, the direction dependence of critical current is observed, in accordance with experimental results.
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