Magnetic transition and spin-polarized two-dimensional electron gas controlled by polarization switching in strained CaMnO${}_3$/BaTiO${}_3$ slabs

Abstract

$Ab$ $initio$ calculations show the presence of a strong magnetoelectric interfacial coupling in CaMnO${}_3$ ultra-thin film grown on a strained BaTiO${}_3$ ferroelectric film. This heterostructure presents a polarization driven magnetic transition from a G-type to an A-type antiferromagnetic structure. Together with this magnetic transition we find a metallic behaviour at the interface between these two insulators, where the charge character of the carriers can be tuned from electrons to holes by switching the electric polarization direction of the FE film. Besides, the electron gas is spin-polarized while the hole-gas is not.

arXiv comment8 pages, 5 figures, supplementary

References in corpus (22)

• Magnetic effects at the interface between nonmagnetic oxides
• Electrical switching of an antiferromagnet
• Towards ferroelectrically-controlled magnetism: Magnetoelectric effect in Fe/BaTiO3 multilayers
• Creation and control of a two-dimensional electron liquid at the bare SrTiO3 surface
• Theory of polarization enhancement in epitaxial BaTiO${}_3$/SrTiO${}_3$ superlattices
• Comparative first-principles studies of prototypical ferroelectric materials by LDA, GGA, and SCAN meta-GGA
• Prediction of electrically-induced magnetic reconstruction at the manganite/ferroelectric interface
• Giant topological Hall effect in correlated oxide thin films
• First-principles modeling of electrostatically doped perovskite systems
• Effect of the surface polarization in polar perovskites studied from first principles
• Induced magnetoelectric response in Pnma perovkites
• Giant tunability of the two-dimensional electron gas at the interface of gamma-Al2O3/SrTiO3
• Two-dimensional electron gas at the PbTiO${}_3$/SrTiO${}_3$ interface: an ab initio study
• Double exchange-driven spin pairing at the (001) surface of manganites
• Exchange interactions of CaMnO3 in the bulk and at the surface
• Magnetic reconstruction at (001) CaMnO${}_3$ surface
• Mechanism to Generate a Two-Dimensional Electron Gas at the Surface of the Charge-Ordered Semiconductor BaBiO3
• Tuning two-dimensional electron (hole) gases at LaInO${}_3$/BaSnO${}_3$ interfaces: Impact of polar distortions, termination, and thickness
• Interface-Driven Two-Dimensional Superconductivity in Bilayers of BaBiO${}_3$ and BaPbO${}_3$
• Ferroelectric control of spin-polarized two-dimensional electron gas
• Strain induced magnetic transition in CaMnO${}_3$ ultra thin films
• 2D superconductidy driven by interfacial electron-phonon coupling at the BaPbO${}_3$/BaBiO${}_3$ bilayer