Materials World Network: Control of the Electron Nuclear Interaction in NanoElectronic Devices

最后修改日期：06/15/09最后修改人：Daniele Finotello 该奖项支持美国哈佛大学和佛罗里达大学（UF）、瑞士巴塞尔大学和ETH（苏黎世）以及德国的里根斯堡大学之间的研究和教育国际合作。该项目的主要目标是理解，控制和利用电子自旋的超精细相互作用，限制在低维凝聚态系统中，与主晶格的核自旋。凝聚态物理学中的四个新兴主题引起了人们对这一主题的特别关注，使网络规模的活动及时。这些主题是：i）在纳米级控制物质（例如量子点）方面的进展，其中电子与少得多的核自旋相互作用，从而大大增强超精细耦合的有效性; ii）采用电子自旋而不是电荷的自旋电子器件的出现，用于量子中继器、量子计算机和量子存储器的未来前景，用于安全通信和增强计算，iii）新材料中的工程相互作用，例如能带结构的选通和定制，以及iv）高质量制造设施的可用性。这个网络有三个主要的研究方向：i）控制III-V族半导体量子点中的自旋和电子-核相互作用[实验：哈佛;理论：哈佛，巴塞尔]; ii）通过巡回载流子耦合核自旋（RKKY相互作用）和p掺杂异质结构中的核磁[实验：ETH，里根斯堡;理论：UF，巴塞尔，哈佛];和iii）13 C富集的纳米管中的电子-核相互作用[实验：哈佛，理论：哈佛，巴塞尔，UF]。通过研究国际环境中基本问题和应用问题之间的接口，该网络有助于下一代设备工程师和科学家所需的研究生交叉培训，可能与量子相干设备一起工作。哈佛和ETH实验组之间以及哈佛、巴塞尔和UF理论组之间的学生交换将在项目过程中进行

Last Modified Date: 06/15/09 Last Modified By: Daniele Finotello Abstract This award supports an international collaboration for research and education among Harvard University and University of Florida (UF) in the USA, University of Basel and ETH (Zurich) in Switzerland, and University of Regensburg in Germany. The main goal of the project is to understand, control, and utilize the hyperfine interaction of electron spins, confined in low-dimensional condensed matter systems, with the nuclear spins of the host lattice. Four emerging themes in condensed matter physics draw particular attention to this topic, making a Network-scale activity timely. Those themes are: i) advances in nanoscale control of matter, e.g. , quantum dots, where electrons interact with far fewer nuclear spins thereby greatly enhancing the effectiveness of hyperfine coupling; ii) emergence of spintronics devices employing the electron's spin rather than charge for future prospects of quantum repeaters, quantum computers, and quantum memory for secure communication and enhanced computation, iii) engineered interactions in novel materials, such as gating and tailoring of band structure, and iv) availability of high-quality fabrication facilities. There are three main thrusts in this Network: i) control of spin and electron-nuclear interaction in III-V semiconductor quantum dots [experiment: Harvard; theory: Harvard, Basel]; ii) coupling of nuclear spins via itinerant carriers (RKKY interaction) and nuclear magnetism in p-doped heterostructures [experiment: ETH, Regensburg; theory: UF, Basel, Harvard]; and iii) electron-nuclear interactions in 13C-enriched nanotubes [experiment: Harvard, theory: Harvard, Basel, UF]. By investigating the interface between fundamental and applied problems in an international environment, this Network contributes to the kind of cross-training of graduate students that is needed for the next generation of device engineers and scientists, perhaps working with quantum-coherent devices. Exchange of students between experimental groups at Harvard and ETH and between theoretical groups at Harvard, Basel, and UF will take place over the course of the project