Quasiparticle spectrum in mesoscopic superconducting junctions with weak magnetization

TL;DR

This paper theoretically explores how weak magnetization influences the local density of states in mesoscopic superconducting junctions, revealing phase-dependent modifications in both spin-singlet and spin-triplet cases.

Contribution

It provides a detailed theoretical analysis of the impact of weak magnetization on local density of states in mesoscopic proximity structures with phase differences.

Findings

Magnetization significantly modifies the local density of states without phase difference.

Phase difference of π reduces the magnetization's effect due to destructive interference.

Results apply to both spin-singlet s-wave and spin-triplet p-wave superconducting cases.

Abstract

We theoretically investigate the effects of the weak magnetization on the local density of states of mesoscopic proximity structures, where two superconducting terminals are attached to a side surface of the diffusive ferromagnet wire with a phase difference. When there is no phase difference, the local density of states is significantly modified by the magnetization in both spin-singlet $s$-wave and spin-triplet $p$-wave cases. When the phase difference is $\pi$, the local density of stets is less modified by the magnetization compared with the in-phase case because of the destructive interference of Cooper pairs.