用于辐射免疫纳米电子学的真空栅介质无掺杂碳纳米带/纳米管场效应晶体管的性能预测

Nanomaterials Pub Date : 2024-06-01 DOI:10.3390/nano14110962
K. Tamersit, A. Kouzou, José Rodríguez, Mohamed Abdelrahem
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引用次数: 0

摘要

本文采用量子模拟方法,通过计算分析研究了真空栅介电无掺杂碳纳米管/纳米带场效应晶体管(VGD-DL CNT/GNRFET)的性能。该方法将泊松求解器的自洽解与弹道极限的模式空间非平衡格林函数(NEGF)整合在一起。采用真空栅极电介质(VGD)范式可确保辐射硬化功能,同时避免辐射诱导的陷落电荷机制,而无掺杂范式则可避免在纳米尺度上实现急剧的掺杂梯度,从而提高制造灵活性。纳米器件的静电掺杂是通过源极和漏极掺杂栅实现的。模拟包括 MOSFET 和隧道 FET (TFET) 模式。数值研究全面考察了电势分布、传输特性、阈下摆动、漏电流、导通电流、电流比和扩展能力。研究结果证明了真空纳米器件在高性能、抗辐射开关应用方面的稳健性。此外,还成功地提出了通过掺杂栅极电压调整进行外在增强的建议,以优化带图并提高超标量级下的开关性能。这些发现强调了真空栅介质碳基纳米晶体管在超大规模、高性能、高能效和抗辐射纳米电子学方面的潜力。
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Performance Projection of Vacuum Gate Dielectric Doping-Free Carbon Nanoribbon/Nanotube Field-Effect Transistors for Radiation-Immune Nanoelectronics
This paper investigates the performance of vacuum gate dielectric doping-free carbon nanotube/nanoribbon field-effect transistors (VGD-DL CNT/GNRFETs) via computational analysis employing a quantum simulation approach. The methodology integrates the self-consistent solution of the Poisson solver with the mode space non-equilibrium Green’s function (NEGF) in the ballistic limit. Adopting the vacuum gate dielectric (VGD) paradigm ensures radiation-hardened functionality while avoiding radiation-induced trapped charge mechanisms, while the doping-free paradigm facilitates fabrication flexibility by avoiding the realization of a sharp doping gradient in the nanoscale regime. Electrostatic doping of the nanodevices is achieved via source and drain doping gates. The simulations encompass MOSFET and tunnel FET (TFET) modes. The numerical investigation comprehensively examines potential distribution, transfer characteristics, subthreshold swing, leakage current, on-state current, current ratio, and scaling capability. Results demonstrate the robustness of vacuum nanodevices for high-performance, radiation-hardened switching applications. Furthermore, a proposal for extrinsic enhancement via doping gate voltage adjustment to optimize band diagrams and improve switching performance at ultra-scaled regimes is successfully presented. These findings underscore the potential of vacuum gate dielectric carbon-based nanotransistors for ultrascaled, high-performance, energy-efficient, and radiation-immune nanoelectronics.
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