arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1805.02100physics.app-phcond-mat.mes-hall
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具有石墨烯基电极的四面体非晶碳电阻存储器

Tetrahedral amorphous carbon resistive memories with graphene-based electrodes

A. K. Ott, C. Dou, U. Sassi, I. Goykhman, D. Yoon, J. Wu, A. Lombardo, A. C. Ferrari

摘要:

电阻开关存储器是硅基存储器的替代品,硅基存储器面临缩放和高功耗问题。四面体无定形碳(ta-C)显示可逆的、非挥发性的电阻切换。在这里,我们报告的极性无关的ta-C电阻式存储器件与石墨烯为基础的电极。我们的器件显示开/关电阻比$\sim$ 4 x $10^5$,比金属电极高10倍,开关功率没有增加,功率密度低$\sim$ 14 $μ$ W/ $μ$ m $^2$。我们将此归因于由于狄拉克点附近石墨烯的低态密度而抑制的隧穿电流,这与从量子点接触模型导出的电流-电压特性一致。我们的器件还具有多个电阻状态。这允许每个单元存储多于一位。这可以在一系列信号处理/计算类型的操作中被利用,例如实现逻辑、提供突触和神经元样模拟以及在非冯·诺依曼架构中执行模拟信号处理

英文摘要:

Resistive-switching memories are alternative to Si-based ones, which face scaling and high power consumption issues. Tetrahedral amorphous carbon (ta-C) shows reversible, non-volatile resistive switching. Here we report polarity independent ta-C resistive memory devices with graphene-based electrodes. Our devices show ON/OFF resistance ratios$\sim$4x$10^5$, ten times higher than with metal electrodes, with no increase in switching power, and low power density$\sim$14$μ$W/$μ$m$^2$. We attribute this to a suppressed tunneling current due to the low density of states of graphene near the Dirac point, consistent with the current-voltage characteristics derived from a quantum point contact model. Our devices also have multiple resistive states. This allows storing more than one bit per cell. This can be exploited in a range of signal processing/computing-type operations, such as implementing logic, providing synaptic and neuron-like mimics, and performing analogue signal processing in non-von-Neumann architectures

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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