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- W4386413757 abstract "The efficient electrical detection and manipulation of antiferromagnetic moments is challenging. We show that the spin current and antiferromagnetic moments in the topological insulator/antiferromagnetic insulator bilayer (Bi,Sb) <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> Te <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</inf> /α-Fe <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> O <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</inf> can be controlled via topological surface states. The spin current can control the moment rotation in the antiferromagnetic insulator by means of a giant spin-orbit torque (SOT) generated by the topological surface states, where the switching is detected by the magnetoresistance signal at the interface, named as Rashba-Edelstein magnetoresistance (RE-MR). The required threshold switching current density is 3.5 × 10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>6</sup> A cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>−2</sup> at room temperature, which is one order of magnitude smaller than that required in heavy-metal/antiferromagnetic insulator systems, exhibiting the potential for ultralow energy consumption. Notably, the topological surface states of (Bi,Sb) <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> Te <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</inf> can be modulated by applying a gate voltage, giving rise to electrically controllable RE-MR and SOT switching. Consequently, when the Fermi-level location of (Bi,Sb) <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> Te <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</inf> is tailored by electric fields, the signal of RE-MR is enhanced and the threshold switching current density is further decreased." @default.
- W4386413757 created "2023-09-05" @default.
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- W4386413757 date "2023-05-01" @default.
- W4386413757 modified "2023-09-27" @default.
- W4386413757 title "Control of spin currents and antiferromagnetic moments via topological surface states for ultralow energy consumption" @default.
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- W4386413757 doi "https://doi.org/10.1109/intermagshortpapers58606.2023.10228722" @default.
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