Multiferroic van der Waals heterostructure FeCl/ScCO: Nonvolatile electrically switchable electronic and spintronic properties
arXiv:2203.15244 · doi:10.1103/PhysRevB.105.165302
Abstract
Multiferroic van der Waals (vdW) heterostrucutres offers an exciting route towards novel nanoelectronics and spintronics device technology. Here we investigate the electronic and transport properties of multiferroic vdW heterostructure composed of ferromagnetic FeCl monolayer and ferroelectric ScCO monolayer using first-principles density functional theory and quantum transport simulations. We show that FeCl/ScCO heterostructure can be reversibly switched from semiconducting to half-metallic behavior by electrically modulating the ferroelectric polarization states of ScCO. Intriguingly, the half-metallic phase exhibits a Type-III broken gap band alignment, which can be beneficial for tunnelling field-effect transistor application. We perform a quantum transport simulation, based on a \emph{proof-of-concept} two-terminal nanodevice, to demonstrate all-electric-controlled valving effects uniquely enabled by the nonvolatile ferroelectric switching of the heterostructure. These findings unravels the potential of FeCl/ScCO vdW heterostructures as a building block for designing a next generation of ultimately compact information processing, data storage and spintronics devices.
arXiv comment9 pages, 5 figures, accepted for publication in Physical Review B (2022)
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