Intercalation doping is emerging as a prospective solution to enhance the performance of graphene nanoribbon interconnects. In this paper, the radio frequency (RF) analysis of stage-2 arsenic pentafluoride- and lithium-doped multilayer graphene nanoribbons (MLGNRs) has been carried out for global-level interconnects in terms of skin depth, surface impedance, critical ratio (C_R), transfer gain, and 3-dB bandwidth. The skin-depth results demonstrate that doped MLGNRs exhibit minimum performance degradation primarily due to their higher conductivity, mean free path, and momentum relaxation time as compared to neutral MLGNR. An equivalent second-order accurate RLC model of an intercalation-doped MLGNR has been used to extract the transfer gain and 3-dB bandwidth results at 14-nm technology node for global-level interconnects. The results are further evaluated by implementing an advanced π-type equivalent single conductor derived from multi-conductor transmission line model. The doped MLGNR interconnects demonstrate 11-fold enhancement of 3-dB bandwidth as compared to copper (Cu). Also, the delay and energy-delay-product (EDP) computations in time domain for doped MLGNR interconnects exhibit nearly 10 times lesser delay and significant reduction in EDP than Cu counterparts. It is also observed that optimum values for 3-dB bandwidth and EDP parameters for intercalated MLGNRs could be achieved through width optimization. The RF and transient results validate intercalated MLGNRs as a potential candidate to replace Cu for next-generation global-level interconnects.

中文翻译：

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基于插层石墨烯纳米带的全局互连的射频分析

插层掺杂正在成为增强石墨烯纳米带互连性能的一种预期解决方案。在本文中，已经针对趋肤深度，表面阻抗，临界比（C）对全局级互连进行了第二阶段的五氟化砷和锂掺杂的多层石墨烯纳米带（MLGNR）的射频（RF）分析。_[R），传输增益和3 dB带宽。趋肤深度结果表明，与中性MLGNR相比，掺杂的MLGNRs表现出最小的性能下降，这主要是由于其较高的电导率，平均自由程和动量松弛时间。插层式掺杂的MLGNR的等效二阶精确RLC模型已用于提取14纳米技术节点处的传输增益和3-dB带宽结果，用于全球级互连。通过实现从多导体传输线模型导出的高级π型等效单导体，可以进一步评估结果。与铜（Cu）相比，掺杂的MLGNR互连具有3 dB带宽的11倍增强。也，掺杂的MLGNR互连在时域中的延迟和能量延迟乘积（EDP）计算显示出比Cu对应物少近10倍的延迟，并且EDP显着降低。还观察到，可以通过宽度优化来获得3 dB带宽的最佳值和插入的MLGNR的EDP参数。射频和瞬态结果验证了嵌入的MLGNRs是替代铜替代下一代全球级互连的潜在选择。