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July 23, 2026Journal of Physics Condensed Matter

Spin Josephson diode effect induced by higher-harmonic spin Josephson currents in a diffusive Josephson junction

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Authors

SHShin-ichi Hikino

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Overview

Theoretical analysis reveals asymmetric spin currents in a Josephson junction, indicating potential for nonreciprocal transport.

Key Points

  • The aim is to explore the spin Josephson diode effect in a Josephson junction with a Rashba layer under an exchange field.
  • Theoretical investigation using quasiclassical Green's function framework.
  • Derivation of expressions for first- and second-harmonic spin Josephson currents.
  • Numerical analysis of effects caused by variations in metal thickness and spin-orbit interaction.
  • The intrinsic asymmetry between forward and backward spin currents confirms the presence of the spin Josephson diode effect.
  • Efficiency decreases with increasing metal thickness due to a reduction in the second-harmonic component.
  • Dependence on spin-orbit interaction strength shows competing effects impacting phase shift enhancement and harmonic suppression.

Cite This Study

Shin-ichi Hikino (2026) studied this question.

synapsesocial.com/papers/6a61aeeefaa9903c51169edahttps://doi.org/10.1088/1361-648x/ae8d6b
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