Abstract
We propose a new spin–orbit torque-based domino-style spin logic (SOT-DSL) that operates in a sequence of preset and evaluation modes of operation. During the preset mode, the output magnet is clocked to its hard axis using spin-Hall effect. In the evaluation mode, the clocked output magnet is switched by a spin current from the preceding stage. The nanomagnets in SOT-DSL are always driven by orthogonal spins rather than collinear spins, which in turn eliminates the incubation delay and allows fast magnetization switching. Based on our simulation results, SOT-DSL shows up to 50% improvement in energy consumption compared to all-spin logic. Moreover, SOT-DSL relaxes the requirement for buffer insertion between long spin channels and significantly lowers the design complexity.
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