Manipulation of spin dephasing in InAs quantum wires

TL;DR

This paper investigates how the spin dephasing in InAs quantum wires can be controlled by the electric field direction and magnetic fields, revealing nonlinear effects and proposing a new measure for inhomogeneous broadening.

Contribution

It demonstrates the dependence of spin dephasing on electric field orientation and introduces a new quantity to understand many-body spin dephasing due to Rashba effect.

Findings

Spin dephasing is strongly affected by the Rashba effective magnetic field angle.

Nonlinear relationship between spin dephasing time and electric field direction.

A new quantity effectively represents inhomogeneous broadening in the system.

Abstract

The spin dephasing due to the Rashba spin-orbit coupling, especially its dependence on the direction of the electric field is studied in InAs quantum wire. We find that the spin dephasing is strongly affected by the angle of Rashba effective magnetic field and the applied magnetic field. The nonlinearity in spin dephasing time versus the direction of the electric field shows a potential evenue to manipulate the spin lifetime in spintronic device. Moreover, we figure out a quantity that can well represent the inhomogeneous broadening of the system which may help us to understand the many-body spin dephasing due to the Rashba effect.