EAGER: Enabling Quantum Leap: Nanoengineering of Two-Dimensional and Twisted Ferromagnets Towards Room-Temperature Quantum Logic

EAGER：实现量子飞跃：二维和扭曲铁磁体纳米工程迈向室温量子逻辑

• 批准号: 1838456
• 负责人: Marija Drndic
• 金额: $ 30万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-15 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1838456&HistoricalAwards=false
• 关键词: EAGER; Enabling; Quantum; Leap; Nanoengineering

Nontechnical description: This EAGER project focuses on developing a new family of ultrathin, practically two dimensional magnetic materials using layer-on-layer stacking of atomically thin films of magnetic materials. Specifically, this work is focused on making nanoelectronic devices with ultrathin magnetic materials, where the active region is only a few atoms thick. The goal is to better understand the magnetic and electronic properties of these materials and devices. We develop experimental and theoretical tools to manipulate and model these magnetic materials, guided by a vision for these systems as platforms for efficient information storage and quantum information processing technologies. The research engages the participation of one graduate research student and one postdoctoral associate. The broader impacts of this project include activities to present cutting edge concepts in nanoscience to high school students through the Penn Experimental Research Physics Academy and Penn Summer Prep program, as well as to the general public through the annual Philadelphia Science Festival. Technical Description: This project focuses on the two-dimensional (2D) transition metal dichalcogenides vanadium disulfide and vanadium diselenide, shown to exhibit ferromagnetism with in-plane magnetic moments and Curie temperatures around room temperature, and are thus promising candidates for room-temperature quantum applications. Through theory, computation, and experiment, the research team is studying two main aspects of these materials: (a) their properties through the transition from 2D to 1D behavior in patterned structures, and (b) the emergent phenomena induced in rotationally misaligned multilayer stacks. The experimental component of the project combines growth by chemical vapor deposition, mechanical exfoliation and transfer, and electrical, optical, and magnetic measurements. In task (a) the project aims to develop controlled and scalable growth and fabrication techniques to create high-quality 2D materials and quasi-1D sculpted nanostructures with room temperature functionality in nanometer-scale architectures for spintronic and other device applications. Concurrently, the team aims to optimize structural properties such as atomic edge configuration, defect types and density, and relative lattice orientation to maximize performance. In task (b) the project seeks to discover and exploit the emergent quantum effects of rotational stacking of these materials and investigate the spin textures arising from the spatially modulated interlayer magnetic coupling. These spin textures may provide a rich variety of new physical effects and provide a platform for quantum information processing manipulatable by spin transfer torques. The broader impacts of this project include activities to present cutting edge concepts in nanoscience to high school students through the Penn Experimental Research Physics Academy and Penn Summer Prep program, and to the general public through the annual Philadelphia Science Festival.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.

非技术性描述：这个EAGER项目的重点是开发一个新的家庭的磁性材料，实际上是二维的磁性材料，使用层对层堆叠的磁性材料的原子薄膜。具体来说，这项工作的重点是用磁性材料制造纳米电子器件，其中有源区只有几个原子厚。目的是更好地了解这些材料和器件的磁性和电子特性。我们开发实验和理论工具来操纵和模拟这些磁性材料，并将这些系统作为高效信息存储和量子信息处理技术的平台。这项研究涉及一名研究生和一名博士后助理的参与。该项目的更广泛的影响包括通过宾夕法尼亚实验研究物理学院和宾夕法尼亚大学暑期预科课程向高中生展示纳米科学前沿概念的活动，以及通过年度费城科学节向公众展示的活动。技术说明：该项目的重点是二维（2D）过渡金属二硫属化合物二硫化钒和二硒化钒，显示出铁磁性，具有面内磁矩和室温附近的居里温度，因此是室温量子应用的有希望的候选者。通过理论，计算和实验，研究小组正在研究这些材料的两个主要方面：（a）通过图案化结构中从2D到1D行为的转变，以及（B）在旋转错位多层堆叠中引起的涌现现象。该项目的实验部分结合了化学气相沉积，机械剥离和转移，以及电气，光学和磁性测量的生长。在任务（a）中，该项目旨在开发可控和可扩展的生长和制造技术，以在纳米级架构中创建高质量的2D材料和具有室温功能的准1D雕刻纳米结构，用于自旋电子和其他器件应用。同时，该团队的目标是优化结构特性，如原子边缘配置，缺陷类型和密度，以及相对晶格取向，以最大限度地提高性能。在任务（B）中，该项目旨在发现和利用这些材料的旋转堆叠的涌现量子效应，并研究由空间调制的层间磁耦合引起的自旋纹理。这些自旋纹理可以提供丰富多样的新的物理效应，并提供一个平台，用于量子信息处理可操纵的自旋转移扭矩。该项目的更广泛的影响包括通过宾夕法尼亚实验研究物理学院和宾夕法尼亚大学暑期预科项目向高中生展示纳米科学前沿概念的活动，以及通过年度费城科学节向公众展示纳米科学前沿概念的活动。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Controlled doping of graphene by impurity charge compensation via a polarized ferroelectric polymer

• DOI: 10.1063/5.0003099
• 发表时间: 2020-03
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Kelotchi S. Figueroa;N. Pinto;Srinivas V. Mandyam;Meng-qiang Zhao;C. Wen;Paul Masih Das;Zhaoli Gao;M. Drndić;A. T. Charlie Johnson

Atomic-scale patterning in two-dimensional van der Waals superlattices

• DOI: 10.1088/1361-6528/ab596c
• 发表时间: 2020-03-06
• 期刊: NANOTECHNOLOGY
• 影响因子: 3.5
• 作者: Das, Paul Masih;Thiruraman, Jothi Priyanka;Drndic, Marija
• 通讯作者: Drndic, Marija

Large-area epitaxial growth of curvature-stabilized ABC trilayer graphene

• DOI: 10.1038/s41467-019-14022-3
• 发表时间: 2020-01-28
• 期刊: NATURE COMMUNICATIONS
• 影响因子: 16.6
• 作者: Gao, Zhaoli;Wang, Sheng;Johnson, A. T. Charlie
• 通讯作者: Johnson, A. T. Charlie

Large area few-layer TMD film growths and their applications

• DOI: 10.1088/2515-7639/ab82b3
• 发表时间: 2020-04-01
• 期刊: JOURNAL OF PHYSICS-MATERIALS
• 影响因子: 4.8
• 作者: Mandyam, Srinivas V.;Kim, Hyong M.;Drndic, Marija
• 通讯作者: Drndic, Marija