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    A recent 2D spinFET concept proposes to switch electrostatically between two separate sublayers with strong and opposite intrinsic Rashba effects, exploiting the spin-layer-locking mechanism in centrosymmetric materials with local dipole fields. Here, we propose a novel monolayer material within this family, lutetium oxide iodide (LuIO). It displays one of the largest Rashba effects among 2D materials (up to kR = 0.08 Å-1), leading to a π/2 rotation of the spins over just 1 nm. The monolayer was predicted to be exfoliable from its experimentally known 3D bulk counterpart, with a binding energy lower than graphene. We characterize and simulate the interplay of the two gate-controlled parameters for such devices: doping and spin channel selection. We show that the ability to split the spin channels in energy diminishes with doping, leading to specific gate-operation guidelines that can apply to all devices based on spin-layer locking.

    Citation

    Rong Zhang, Antimo Marrazzo, Matthieu Jean Verstraete, Nicola Marzari, Thibault Daniel Pierre Sohier. Gate Control of Spin-Layer-Locking FETs and Application to Monolayer LuIO. Nano letters. 2021 Sep 22;21(18):7631-7636

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    PMID: 34460271

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