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arXiv 2103.02724cond-mat.mes-hallcs.ETcs.SYeess.SY
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基于压控磁各向异性时钟的Skyrmion逻辑

Skyrmion Logic Clocked via Voltage Controlled Magnetic Anisotropy

Benjamin W. Walker, Can Cui, Felipe Garcia-Sanchez, Jean Anne C. Incorvia, Xuan Hu, Joseph S. Friedman

摘要:

磁skyrmions是令人兴奋的候选人节能计算由于其非挥发性,可检测性和流动性。最近的一个建议,在可逆计算的范例,使大规模的电路组成的直接级联skyrmion逻辑门,但它是有限的制造困难和能源成本与skyrmion同步使用的缺口。为了克服这些挑战,因此,我们提出了一个skyrmion logicsynchronized通过调制的电压控制的磁各向异性(VCMA)。除了通过微磁模拟证明VCMA同步的原理外,我们还量化了电流密度、skyrmion速度和各向异性势垒高度对skyrmion运动的影响。进一步的微磁结果证明了级联逻辑电路的可行性,其中VCMA同步器使时钟和流水线,说明了一个可行的途径,以节能的大规模计算系统的基础上磁skyrmions。

英文摘要:

Magnetic skyrmions are exciting candidates for energy-efficient computing due to their non-volatility, detectability,and mobility. A recent proposal within the paradigm of reversible computing enables large-scale circuits composed ofdirectly-cascaded skyrmion logic gates, but it is limited by the manufacturing difficulty and energy costs associated withthe use of notches for skyrmion synchronization. To overcome these challenges, we therefore propose a skyrmion logicsynchronized via modulation of voltage-controlled magnetic anisotropy (VCMA). In addition to demonstrating theprinciple of VCMA synchronization through micromagnetic simulations, we also quantify the impacts of current den-sity, skyrmion velocity, and anisotropy barrier height on skyrmion motion. Further micromagnetic results demonstratethe feasibility of cascaded logic circuits in which VCMA synchronizers enable clocking and pipelining, illustrating afeasible pathway toward energy-efficient large-scale computing systems based on magnetic skyrmions.

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