Graphene nanoribbon-based nanoelectronic and molecular spintronic devices

基于石墨烯纳米带的纳米电子和分子自旋电子器件

• 批准号: 0725566
• 负责人: Branislav Nikolic
• 金额: $ 27.43万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0725566&HistoricalAwards=false
• 关键词: Graphene; nanoribbon; based; nanoelectronic; molecular

Proposal Number: 0725566Proposal Title: Graphene nanoribbon-based nanoelectronic and molecular spintronic devicesPI Name: Nikolic, BranislavPI Institution: University of DelawareThe objective of this research is to model theoretically nanoelectronic and nanospintronic devices built around graphene nanoribbons. Graphene represents a monolayer of carbon atoms densely packed into a honeycomb lattice. Although bulk graphene is a zero-gap semiconductor, its quantum wires and dots exhibit charge and spin properties that can be manipulated through the topology of their edges and their size. The approach to the modeling of spin and charge currents in hybrid and all-graphene multiterminal nanostructures is based on the development of novel computational algorithms using the nonequilibrium Green functions, density functional theory, and electron-electron interaction treatment beyond self-consistent mean field when necessary for ultrasmall devices.Intellectual merit:The recent discovery of graphene has ushered unforeseen avenues to explore low-dimensional electron system, probe quantum electrodynamics of charged neutrinos in table-top experiments, and build quantum-coherent carbon-based nanoelectronic devices. Unlike carbon nanotubes, which are a rolled up sheets of graphene, the proposed graphene devices will be easy to integrate with standard lithographic techniques. Moreover, their ultrasmall size and reduced power consumption could offer a viable alternative to aging silicon technology, whilemaking it possible to exploit quantum interference effects in charge and spin transport, even at room temperature.Broader Impact:The proposed research will offer excellent training for graduate and undergraduate students in quantum transport and parallel computing techniques. The outreach will include summer schools and creation of visual simulations to teach the exciting physics of relativistic electrons in graphene through computational science courses and on the Web.

提案编号：0725566提案标题：基于石墨烯纳米带的纳米电子和分子自旋电子器件名称：Nikolic， BranislavPI机构：University of delaware本研究的目的是对围绕石墨烯纳米带构建的纳米电子和纳米自旋电子器件进行理论建模。石墨烯是一种单层的碳原子，被密集地包裹在蜂窝状晶格中。尽管块状石墨烯是一种零间隙半导体，但它的量子线和量子点表现出电荷和自旋特性，可以通过其边缘和尺寸的拓扑结构来操纵。混合和全石墨烯多终端纳米结构中自旋和电荷电流的建模方法是基于使用非平衡格林函数、密度泛函理论和电子-电子相互作用处理的新型计算算法的发展，这些算法在超小型器件中需要超越自一致平均场。知识价值：最近石墨烯的发现为探索低维电子系统、在桌面实验中探测带电中微子的量子电动力学以及构建量子相干碳基纳米电子器件开辟了不可预见的途径。碳纳米管是一层卷起来的石墨烯，与之不同的是，石墨烯器件将很容易与标准的光刻技术集成。此外，它们的超小尺寸和低功耗可以为老化的硅技术提供可行的替代方案，同时使利用电荷和自旋输运中的量子干涉效应成为可能，即使在室温下也是如此。更广泛的影响：拟议的研究将为研究生和本科生提供量子输运和并行计算技术方面的优秀培训。拓展活动将包括暑期学校和创建视觉模拟，通过计算科学课程和网络教授石墨烯中相对论电子的令人兴奋的物理学。