The influence of the spin-dependent phases of tunneling electrons on the conductance of a point ferromagnet/isolator/d-wave superconductor contact

TL;DR

This paper investigates how spin-dependent phase shifts in electron tunneling affect the conductance in ferromagnet/insulator/d-wave superconductor junctions, revealing orientation-dependent modifications to conductance peaks.

Contribution

It demonstrates the role of spin-dependent phase shifts in modifying conductance features in FIS contacts with different superconductor orientations, a novel insight.

Findings

SDPS can suppress or restore conductance peaks depending on superconductor orientation.

Orientation of the d-wave superconductor critically influences conductance behavior.

The study provides a detailed understanding of SDPS effects on Andreev reflection in FIS contacts.

Abstract

The influence of the spin-dependent phase shifts (SDPS) associated to the electronic reflection and transmission amplitudes acquired by electrons upon scattering on the potential barrier on the Andreev reflection probability of electron and hole excitations for a ferromagnet/isolator/d-wave superconductor (FIS) contact and the charge conductance of the FIS contact is studied. Various superconductor orientations are considered. It is found that SDPS can suppress the zero-potential peak and restore finite-potential peaks in the charge conductance of the F/I/d-wave superconductor contact for the (110) orientation of the d-wave superconductor and, on the contrary, can restore the zero-potential peak and suppress finite-potential peaks for the $\{100\}$ orientation of the d-wave superconductor.