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spin logic operations based on magnetization switching by asymmetric spin current

Science China(Information Sciences) 2022年第2期65卷 181-187页

作者： Yucai LI Nan ZHANG Kaiyou WANG State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing Academy of Quantum Information Sciences

spintronic devices based on spin orbit torques(SOT) exhibit advantages in low power consumption, high speed, reconfigurability, and high endurance, which offers the prospect of in-memory computing based on spin logic devices. By designing a local spin current gradient, the magnetization can be switched deterministically by asymmetric spin currents without external magnetic field using micromagnetic simulations, where an additional out of plane effective field can be generated by the spin gradient. Through capping half of the Pt/Co/Pt SOT devices with Pt strip, we demonstrate the field-free deterministic currentinduced magnetization switching experimentally. Finally, we design AND, NAND, OR, and NOR Boolean logic gates based on these devices, which could be used as building blocks for programmable and stateful logic operations.

关键词： spin orbit torque spin currents spin current gradient magnetization switching spin logic

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spin-current pump in silicene

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Chinese Physics B 2018年第5期27卷 500-503页

作者： John Tombe Jada Marcellino Mei-Juan Wang Sa-Ke Wang Jun Wang Department of Physics Southeast UniversityNanjing 210096China Department of Fundamental Courses Jinling Institute of TechnologyNanjing 211169China

We report a theoretical study of pumped spin currents in a silicene-based pump device,where two time-dependent staggered potentials are introduced through the perpendicular electric fields and a magnetic insulator is considered in between the two pumping potentials to magnetize the Dirac *** is shown that giant spin currents can be generated in the pump device because the pumping can be optimal for each transport mode,the pumping current is *** controlling the relevant parameters of the device,both pure spin currents and fully spin-polarized currents can be *** results may shed a new light on the generation of pumped spin currents in Dirac-electron systems.

关键词： spin currents charge pump quantization silicene

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