Andreev reflection and subgap conductance in monolayer $Mo{S}_2$ ferromagnet/$s$ and $d$-wave superconductor junction

Abstract

The accurate and proper form of electron-hole excitations and corresponding Dirac-like spinors of monolayer molybdenum disulfide superconductor are exactly obtained. Andreev reflection and resulting subgap conductance in a $Mo{S}_2$-based ferromagnetic superconducting (F/S) junction is accurately investigated in terms of dynamical characteristics of system. Due to spin-splitting energy gap in the valence band and nondegenerate $K$ and $K^{\prime }$ valleys, the ferromagnetic exchange energy $\sigma h$ can cause a distinct behavior of Andreev process between spin-up and spin-down charge carriers belonging to different valleys. The chemical potential is necessarily fixed by a determined range in order to occur the retro Andreev reflection. Given one-particle superconducting bispinors enable us to explicitly involve the anisotropic superconducting gap ${\Delta }_S$ under electron-hole conversion, i.e., taking place in $d$-wave pair coupling. The effect of such gap is exactly explained in terms of the dependence of the Andreev process on the electron incidence angle at the interface.

arXiv comment11 pages, 10 figures

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Cited by in corpus (3)

• Transport properties of spin-triplet superconducting monolayer $Mo{S}_2$
• Spin-triplet $f$-wave symmetry in superconducting monolayer $Mo{S}_2$
• Asymmetric Andreev resonant state with a magnetic exchange field in spin-triplet superconducting monolayer $Mo{S}_2$