Josephson effect in silicene-based SNS Josephson junction: Andreev reflection and free energy

Abstract

We investigate the Josephson effcet in superconductor-normal-superconductor junction (SNS) base on the doped unbiased silicene under the perpendicular electric field and off-resonance circularly polarized light. The Andreev reflection (including the retroreflection and specular one) during the subgap transport, the free energy, and the reversal of the Josephson effect as well as the emergence of ${\varphi }_0$-junction are exploited. The Andreev reflection is complete in the NS interface even for the clean interface and without the Fermi wave vector mismatch, which is opposite to the case of ferromagnet-superconductor interface. The important role played by the dynamical polarization of the degrees of freedom to the $0-\pi$ transition and the generation of ${\varphi }_0$-junction are mentioned in this paper. The scattering by the charged impurity in the substrate affects the transport properties in the bulk as well as the valley relaxation, which can be taken into consider by the macroscopic wave function. In short junction limit, the approximated results about the Andreev level and free energy are also discussed. Beside the low-energy limit of the tight-binding model, the finite-size effect need to be taken into account as long as the spacing model is much larger than the superconducting gap.

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Cited by in corpus (6)

• Integer quantum Hall conductivity and longitudinal conductivity in silicene under the electric field and magnetic field
• Electronic transport and the related anomalous effects in silicene-like hexagonal lattice
• Many-electron effect to the dynamical polarization of silicene-like two-dimension Dirac materials
• Dynamical polarization, plasmon model, and the Friedel oscillation of the screened potential in doped Dirac and Weyl system
• Electronic transport and dynamical polarization in bilayer silicene-like system
• Dynamical polarization and the optical response of silicene and related materials