Two Dimensional Spin-Polarized Electron Gas at the Oxide Interfaces

Abstract

The formation of a novel spin-polarized 2D electron gas at the LaMnO${}_3$ monolayer embedded in SrMnO${}_3$ is predicted from the first-principles density-functional calculations. The La (d) electrons become confined in the direction normal to the interface in the potential well of the La layer, serving as a positively-charged layer of electron donors. These electrons mediate a ferromagnetic alignment of the Mn t${}_{2g}$ spins near the interface via the Anderson-Hasegawa double exchange and become, in turn, spin-polarized due to the internal magnetic fields of the Mn moments.

5 pages, 6 figures

References in corpus (5)

• Lattice relaxation, electronic screening, and spin and orbital phase diagram of LaTiO${}_3$/SrTiO${}_3$ superlattices
• Electronic reconstruction at SrMnO3-LaMnO3 superlattice interfaces
• Effects of Strain on Orbital Ordering and Magnetism at the Perovskite Oxide Interfaces: LaMnO${}_3$/SrMnO${}_3$
• Magnetically asymmetric interfaces in a (LaMnO${}_3$)/(SrMnO${}_3$) superlattice due to structural asymmetries
• Lattice polarization effects on electron-gas charge densities in ionic superlattices

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