Electric control of spin injection into a ferroelectric semiconductor

Abstract

Electric-field control of spin-dependent properties has become one of the most attractive phenomena in modern materials research due the promise of new device functionalities. One of the paradigms in this approach is to electrically toggle the spin polarization of carriers injected into a semiconductor using ferroelectric polarization as a control parameter. Using first-principles density functional calculations, we explore the effect of ferroelectric polarization of electron-doped BaTiO3 (n-BaTiO3) on the spin-polarized transmission across the SrRuO3/n-BaTiO3 (001) interface. Our study reveals that the interface transmission is negatively spin-polarized and that ferroelectric polarization reversal leads to a change in the transport spin polarization from -65% to -98%. We show that this effect stems from the large difference in Fermi wave vectors between up- and down-spins in ferromagnetic SrRuO3 and a change in the transport regime driven by ferroelectric polarization switching. The predicted sizeable change in the spin polarization provides a non-volatile mechanism to electrically control spin injection in semiconductor-based spintronics devices.

arXiv comment4 pages, 4 figures

References in corpus (11)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Electronic measurement and control of spin transport in Silicon
• Robust isothermal electric switching of interface magnetization: A route to voltage-controlled spintronics
• Ferroelectric Instability under Screened Coulomb Interactions
• Theory of spin-polarized transport in semiconductor heterojunctions: Proposal for spin injection and detection in silicon
• Giant Tunneling Electroresistance Effect Driven by an Electrically Controlled Spin Valve at a Complex Oxide Interface
• Termination Control of the Interface Dipole in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$/Nb:SrTiO${}_3$ (001) Schottky Junctions
• Polarization Controlled Ohmic to Schottky Transition at a Metal/Doped Ferroelectric Interface
• Doping and temperature-dependent optical properties of oxygen-reduced BaTiO3-d
• Spin injection and detection in lanthanum- and niobium-doped SrTiO3 using the Hanle technique
• Evolution of the band alignment at polar oxide interfaces

Cited by in corpus (4)

• Proximity effects in Graphene and Ferromagnetic CrBr3 van der Waals Heterostructure
• Electric field control of spin lifetimes in Nb-SrTiO${}_3$ by spin-orbit fields
• Origin of the kink in the band dispersion of the ferromagnetic perovskite SrRuO3: Electron-phonon coupling
• Proton-transfer Ferroelectricity / Multiferroicity in Rutile Oxyhydroxides