Manipulating Multi-Spin Dynamics in Systems Targeting Organic Spintronics

操纵有机自旋电子学系统中的多自旋动力学

• 批准号: 1266201
• 负责人: Michael Wasielewski
• 金额: $ 39万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1266201&HistoricalAwards=false
• 关键词: Manipulating; Multi; Spin; Dynamics; Systems

The Chemical Structure, Dynamics and Mechanism B (CSDM-B) program supports Professor Michael R. Wasielewski of Northwestern University to carry out fundamental studies on controlling the spin dynamics of complex multi-spin molecular systems that target spintronics and quantum information processing. Fast photo-initiated electron transfer within covalently-linked organic donor-acceptor molecules having specific donor-acceptor (D-A) distances and orientations results in the formation of spin-entangled electron-hole pairs (i.e. spin-correlated radical ion pairs, SCRPs) having well-defined initial spin configurations and magnetic spin-spin interactions. The project focuses on the demanding task of controlling spin coherence within organic molecular arrays using SCRPs in tailored covalent structures. The specific goals are to investigate: 1) What is the scope of spin coherence transfer by optical excitation of an SCRP? 2) What factors determine coherence dephasing in SCRPs? 3) Can coherent spin states be transported ("teleported") over long distances using SCRPs? 4) Can nuclear spins be used to store and retrieve coherent electron spin states produced by an SCRP? Developing a fundamental understanding of how to control charge and spin transport through organized arrays of organic molecules is critical to the development of new electronics and spintronics especially with regard to their potential impact on computers and information processing. Taking advantage of the quantum nature of electron spin may lead to advanced computer technologies with broad applications throughout society. The use of organic materials and bio-inspired approaches to these problems offers the possibility of developing solutions that are not only versatile, but are cost effective and environmentally benign as well.

化学结构，动力学和机制B（CSDM-B）计划支持西北大学的Michael R. Wasielewski教授进行基础研究，以控制针对型旋转基质和量子信息处理的复杂多旋转分子系统的旋转动力学。具有特定的供体 - 受体距离（D-A）距离和方向的共价链接有机供体分子中的快速发射的电子传输会导致自旋符号的电子孔对的形成（即自旋相关的自由基离子对，SCRP，SCRP）具有明确定义的初始旋转型旋转型和磁性旋转兴奋剂相互作用。该项目着重于使用量身定制的共价结构中的SCRP在有机分子阵列中控制自旋相干性的苛刻任务。具体目标是调查：1）通过SCRP的光激发旋转相干传递的范围是什么？ 2）哪些因素决定了SCRP中的连贯性？ 3）是否可以使用SCRP在长距离上运输连贯的自旋状态（“传送”）？ 4）核旋转是否可以用于存储和检索由SCRP产生的相干电子自旋态？对如何通过有组织的有机分子阵列控制电荷和旋转传输的基本了解对于新电子和旋转的发展至关重要，尤其是在其对计算机和信息处理的潜在影响方面。利用电子自旋的量子性质可能会导致在整个社会中具有广泛应用的高级计算机技术。在这些问题上使用有机材料和生物启发的方法提供了开发不仅具有通用性的解决方案，而且具有成本效益和环境良性的可能性。