Electrical Spin Injection at Chemically Modified Organic/Inorganic Interfaces

技术描述：本项目的中心目标是确定界面结构、化学和能带对准在混合有机/无机异质结构中的自旋输运和散射中的作用。该项目由两个部分组成。第一个重点是使用先前演示的自旋输运技术来探索无机表面的化学改性和钝化对有机/无机杂化体系中自旋输运的影响。第二个重点是开发新的测量几何结构，利用铁磁接近极化的超快泵-探针技术直接探测裸露和修饰无机表面的有机/无机界面上的交换相互作用。该项目的成功可以为开发混合和全有机自旋电子器件奠定基础，这些器件利用了有机系统中相对容易制造和固有的化学功能。非技术描述：本研究项目是将有机磁性材料整合到发展中的自旋电子学领域，这依赖于利用材料的磁性来实现低功耗和瞬时电子。有机基材料的使用可以潜在地导致室温操作，廉价的制造和化学传感芯片集成的固有化学灵敏度。有机电子学的扩展，包括有机基磁性材料和器件，使其能够发展与传统固态自旋电子学互补的能力，就像有机发光二极管和有机薄膜晶体管为更传统的无机电子器件提供了低成本、更容易制造的替代品一样。此外，PI还与俄亥俄州立大学费舍尔商学院的技术创业与商业化学院合作，与物理学博士生组成合作团队，利用“实时”知识产权制定可行的商业化商业计划。这种培训远远超出了目前典型的物理学博士所能获得的培训，填补了我们国家STEM劳动力发展中的一个关键空白。

Technical Description: The central aim of this project is to determine the role of interface structure, chemistry and band alignment in spin transport and scattering in hybrid organic/inorganic heterostructures. The project consists of two components. The first is focused on using previously demonstrated spin-transport techniques to explore the impact of chemical modification and passivation of the inorganic surface on spin transport in hybrid organic/inorganic systems. The second focuses on the development of novel measurement geometries to directly probe the exchange interaction across the organic/inorganic interface for both bare and modified inorganic surfaces using the ultrafast pump-probe technique of ferromagnetic proximity polarization. The success of the project can help laying the foundation for the development of both hybrid and all-organic spintronic devices that exploit the relative ease of fabrication and inherent chemical functionality available in organic systems.Non-technical Description: This research project is on the integration of organic-based magnetic materials into the developing field of spintronics, which relies on exploiting the magnetic properties of materials for low-power and instant-on electronics. The use of organic-based materials can potentially lead to room-temperature operation, inexpensive fabrication and intrinsic chemical sensitivity for on-chip integration of chemical sensing. The expansion of organic electronics to include organic-based magnetic materials and devices allows the development of capabilities complementary to traditional solid-state spintronics in much the same fashion that organic light-emitting diodes and organic thin-film transistors have provided low-cost, easier-to-manufacture alternatives for more conventional inorganic electronic devices. In addition, the PI works with physics PhD students in collaborative teams that use "live" intellectual property to develop viable business plans for commercialization, in collaboration with the Technology Entrepreneurship and Commercialization Academy based in the Fischer College of Business at The Ohio State University. This training goes well beyond what is currently available to a typical PhD in physics and fills a critical gap in the development of our nation's STEM workforce.