A Ge(Si) Quantum Dot Magnetic Exchange Switch

Ge(Si)量子点磁交换开关

• 批准号: 0622092
• 负责人: Stuart Wolf
• 金额: $ 8万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0622092&HistoricalAwards=false
• 关键词: Ge; Si; Quantum; Dot; Magnetic

The objective is to explore the feasibility of a novel spin based quantum dot logic paradigm for a magnetic exchange switch. This device will utilize manipulation and control of magnetism in magnetically doped Si(Ge) quantum dots prepared by direct self assembly onto Si substrates. This project will demonstrate that doping these dots with Mn ions will produce high Curie temperature (100K) carrier mediated ferromagnetism, a primary requirement for such a switch. The approach is to use Mn ion implantation into germanium on insulator (GOI) to determine the range of doping that produces high Curie temperature ferromagnetism, followed by aligned ion and electron beam lithography to controllably Mn dope the quantum dots.Intellectual Merit: This project is very important in providing a pathway to a revolutionary switching device based upon advancing our knowledge of dilute magnetism in dimensionally constrained nanostructures.. Magnetism in quantum dots is an area where there have been some recent theoretical advances but no concomitant experimental confirmations.Broader Impacts: Semiconducting electronics is at least a $100B market, and if successful, this work will provide a new avenue for the extension of the semiconducting roadmap and have significant economic as well as technological implications. This program will be a central component of SpINQuEST (Spins in Quantum Systems and Technology), an umbrella center at UVA which offers significant research, educational and outreach programs, including the Spins in Solids Summer Institute. SpINQuEST programs will greatly enhance the students' research, educational and cultural experiences, based upon the diversity of participating institutions.

目的是探索一种新的自旋为基础的量子点逻辑范式的磁交换开关的可行性。 该器件将利用直接自组装到Si衬底上制备的磁性掺杂Si（Ge）量子点的磁性操纵和控制。该项目将证明，用Mn离子掺杂这些点将产生高居里温度（100K）的载流子介导的铁磁性，这是这种开关的主要要求。该方法是使用Mn离子注入到绝缘体上锗（GOI）中以确定产生高居里温度铁磁性的掺杂范围，然后通过对准离子和电子束光刻来可控地Mn掺杂量子点。这个项目是非常重要的，在提供一个革命性的开关设备的基础上推进我们的知识在尺寸受限的纳米结构的稀磁的路径。量子点中的磁性是一个最近取得了一些理论进展但没有随之而来的实验证实的领域。更广泛的影响：半导体电子产品至少是一个价值1000亿美元的市场，如果成功，这项工作将提供一个新的延伸途径半导体路线图并具有重大的经济和技术影响。 该计划将是SpINQuEST（量子系统和技术中的自旋）的核心组成部分，这是UVA的一个伞式中心，提供重要的研究，教育和推广计划，包括固体中的自旋夏季研究所。SpINQuEST计划将大大提高学生的研究，教育和文化经验，基于参与机构的多样性。