Ferroelectric Controlled Spin Texture in Two-Dimensional NbOI2 Monolayer
- 1 September 2021
- journal article
- research article
- Published by IOP Publishing in Chinese Physics Letters
Abstract
The persistent spin helix (PSH) system is considered to have promising applications in energy-conservation spintronics because it supports an extraordinarily long spin lifetime of carriers. Here, we predict that the existence of PSH state in two-dimensional (2D) ferroelectric NbOI2 monolayers. Our first-principles calculation results show that there exists Dresselhaus-type spin-orbit coupling (SOC) band splitting near the conduction-band minimum (CBM) of the NbOI2 monolayer. It is revealed that the spin splitting near CBM merely refers to out-of-plane spin configuration in the wave vector space, which gives rise to a long-lived PSH state that can be controlled by reversible ferroelectric polarization. We believe that the coupling characteristics of ferroelectric polarization and spin texture in NbOI2 provide a platform for the realization of fully electric controlled spintronic devices.Keywords
This publication has 52 references indexed in Scilit:
- First-principles calculations of the ferroelastic transition between rutile-type and-typeat high pressuresPhysical Review B, 2008
- Symmetry and Spin Dephasing in (110)-Grown Quantum WellsPhysical Review Letters, 2008
- Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled SystemPhysical Review Letters, 2006
- Quantum Spin Hall EffectPhysical Review Letters, 2006
- Quantum Spin Hall Effect in GraphenePhysical Review Letters, 2005
- Spin Current and Magnetoelectric Effect in Noncollinear MagnetsPhysical Review Letters, 2005
- Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis setPhysical Review B, 1996
- Projector augmented-wave methodPhysical Review B, 1994
- Special points for Brillouin-zone integrationsPhysical Review B, 1976
- Spin-Orbit Coupling Effects in Zinc Blende StructuresPhysical Review B, 1955