Gate-tunable spin devices based on Spin-orbitronic Engineering in Two-Dimensional Metal Monochalcogenides.

基于二维金属单硫属化物中的自旋轨道电子工程的栅极可调自旋器件。

• 批准号: 2128945
• 负责人: Chun Ning Lau
• 金额: $ 40.5万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2128945&HistoricalAwards=false
• 关键词: Gate; tunable; spin; devices; based

Electrons have an intrinsic spin, making them behave like tiny bar magnets. Spintronics, the control and manipulation of electron spin in a material, has led to multibillion dollar applications such as magnetic hard drives and magnetic random access memory. In many materials, electrons’ spin and spatial motion are linked, and such spin-orbit coupling has led to a variety of spintronic and quantum information applications. Though conventionally the spin-orbit coupling strength is fixed for each material, it is highly tunable in two-dimensional materials that are only a few atomic layers in thickness. This research program takes advantage of this tunable spin-orbit coupling to create two-dimensional material spin devices, including tunable transistors that convert spin currents to charge currents, and transistors enabling long-distance spin transport. This research will be integrated with education and training of graduate and undergraduate students for next generation of STEM task force. In addition, attention will be placed in recruiting, training, and mentoring students from under-represented groups by leveraging existing university programs, including REU, High School Tutoring and Mentoring Program in the Department of Physics, Minority Masters to PhD Bridge, and POLARIS programs, for preparing careers in academia, government and industry.Two-dimensional materials offer new platforms for spin-orbitronic phenomena, devices, and applications with unprecedented tunability. This research program develops electrically controlled and tunable spin-orbitronic applications, using high mobility few-layer InSe that hosts large tunable spin-orbit coupling. Specifically, the thrusts include (1). demonstrating tunable spin-charge interconversion via spin Hall and Edelstein effects and their Onsager reciprocals, and with reversible spin-polarization; (2). realizing a spin helix state for long-ranged spin transport; and (3). exploring spin and charge transport in the presence of periodic 2D spin-orbit lattices that could produce topologically non-trivial magnetic textures. These projects fundamentally advance spin-orbitronic engineering in van der Waals heterostructures, which can be utilized towards spintronic and topological devices that are tunable in operando.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

电子有一个固有的自旋，使它们表现得像微小的条形磁铁。自旋电子学，控制和操纵材料中的电子自旋，已经导致了数十亿美元的应用，如磁性硬盘驱动器和磁性随机存取存储器。在许多材料中，电子的自旋和空间运动是联系在一起的，这种自旋轨道耦合导致了各种自旋电子和量子信息应用。虽然自旋轨道耦合强度通常对每种材料都是固定的，但在只有几个原子层厚度的二维材料中，它是高度可调的。本研究计划利用这种可调谐自旋轨道耦合来创建二维材料自旋器件，包括将自旋电流转换为电荷电流的可调谐晶体管，以及实现长距离自旋输运的晶体管。这项研究将与下一代STEM工作组的研究生和本科生的教育和培训相结合。此外，将把重点放在招募、培训和指导来自代表性不足群体的学生上，利用现有的大学项目，包括REU、物理系高中辅导和指导项目、少数民族硕士到博士的桥梁项目和POLARIS项目，为学术界、政府和工业界的职业生涯做好准备。二维材料为自旋轨道现象、器件和具有前所未有可调性的应用提供了新的平台。本研究计划开发电控和可调谐自旋轨道应用，使用高迁移率的低层insse，承载大型可调谐自旋轨道耦合。具体来说，这些推力包括：(1)通过自旋霍尔效应和Edelstein效应及其Onsager往复式，以及可逆的自旋极化，证明了可调谐的自旋-电荷相互转换；(2).实现远距离自旋输运的自旋螺旋态；(3)探索周期二维自旋轨道晶格存在下的自旋和电荷输运，这种晶格可以产生拓扑上非平凡的磁性结构。这些项目从根本上推进了范德华异质结构的自旋轨道工程，可用于可调谐的自旋电子和拓扑器件。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。