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

摘要

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