Characteristics of persistent spin current components in a quasi-periodic Fibonacci ring with spin-orbit interactions: Prediction of spin-orbit coupling and on-site energy

TL;DR

This study explores how spin-orbit interactions influence persistent spin currents in a Fibonacci ring, enabling estimation of spin-orbit coupling strengths and on-site energy through analysis of spin current components.

Contribution

It introduces a method to predict spin-orbit coupling parameters and on-site energy in a Fibonacci ring by analyzing all three components of persistent spin current.

Findings

All three components of spin current are affected by spin-orbit interactions.

The interplay of Rashba and Dresselhaus effects influences spin current behavior.

Method allows estimation of unknown spin-orbit coupling strength or on-site energy.

Abstract

In the present work we investigate the behavior of all three components of persistent spin current in a quasi-periodic Fibonacci ring subjected to Rashba and Dresselhaus spin-orbit interactions. Analogous to persistent charge current in a conducting ring where electrons gain a Berry phase in presence of magnetic flux, spin Berry phase is associated during the motion of electrons in presence of a spin-orbit field which is responsible for the generation of spin current. The interplay between two spin-orbit fields along with quasi-periodic Fibonacci sequence on persistent spin current is described elaborately, and from our analysis, we can estimate the strength of any one of two spin-orbit couplings together with on-site energy, provided the other is known.