GOALI: Design and Fabrication of a Hybrid Drift Diffusion Spin Valve to Investigate Graphene Spin Transport Properties for Spintronics

GOALI：设计和制造混合漂移扩散自旋阀以研究自旋电子学的石墨烯自旋输运特性

• 批准号: 1711994
• 负责人: Jun Jiao
• 金额: $ 33万
• 依托单位: Portland State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1711994&HistoricalAwards=false
• 关键词: GOALI; Design; Fabrication; Hybrid; Drift

Electronics are based on the manipulation of electrons and other charge carriers. In addition to charge, electrons have spin that can be manipulated with magnetic and electric fields, resulting in a spin-polarized current that carries more information than is possible with charge alone. Spin-transport electronics demonstrate advantages for design of novel devices to overcome the limitation of traditional electronics. Graphene, a single atomic layer of graphitic carbon, has unique physical properties that make it very attractive for spintronic applications. Various experimental demonstrations of spin transport in graphene have been achieved by interfacing graphene with other classes of materials, including ferromagnetic materials, semiconductors, and metal electrodes. However, the experimental results are still well below theoretically predicted values. To bridge this gap, two areas of research is proposed: fabrication of graphene and a design of a novel device to advance graphene-based spintronic devices that will be capable of higher data transfer speeds, increased processing power and memory density, and added storage capacity. The PSU and Intel partnership will significantly enhance the transfer of research results to industry. It will also broaden the training and experiences of graduate and undergraduate students involved and facilitate active interactions between PSU and Intel scientists and train them in emerging areas of materials science and device technology, where fundamental insights can result in profound and rapid practical advances. The participation of underrepresented undergraduates in this project will be leveraged through ongoing NSF funded REU and LSAMP programs, the McNair Scholarship program, and the Undergraduate Research and Mentoring Program at PSU.This proposal aims at the design and fabrication of novel hybrid diffusion drift spin valve (HDDSV) arrays through processes that are adaptable to industry. The proposed device will allow systematic investigations of graphene spin transport parameters including spin lifetime, spin diffusion length, and polarization injection efficiency by variations of device components and dimensions. The non-local spin valves (NLSV) device employed to study graphene spin transport has resulted in experimental values that are orders of magnitude lower than those theoretically predicted. The proposed HDDSVs are uniquely designed to detect nonlocal signals originating from a spin accumulation of spin polarized charge carriers, which occurs away from the influence of ferromagnetic (FM)/tunnel barrier (TB)/Graphene interfaces. This research effort represents a multi-disciplinary approach of combining graphene synthesis, device fabrication, and data measurement and analysis, to advance the understanding of graphene spin transport properties. The overall goal of this research is to address the principle roadblocks to the advancement of graphene spintronics. The novel device configuration will have the capability of isolating the effects of ferromagnetic contacts from graphene spin transport measurements, while enabling spin and charge carrier manipulation simultaneously. The proposed device will allow new spin transfer phenomena to be examined. The study of such a novel device will reveal the fundamental effects of ferromagnetic contacts and charge carrier drift in relation to spin diffusion lengths and spin lifetimes in a graphene transport channel. The academic and industrial research teams' complementary expertise and comprehensive capabilities warrant success of the proposed goals.

电子学基于电子和其他电荷载流子的操纵。除了电荷之外，电子还具有可以通过磁场和电场操纵的自旋，从而产生自旋极化电流，该电流比单独的电荷携带更多的信息。自旋输运电子学展示了设计新颖器件以克服传统电子学局限性的优势。石墨烯是石墨碳的单原子层，具有独特的物理特性，使其对自旋电子应用非常有吸引力。通过将石墨烯与其他类别的材料（包括铁磁材料、半导体和金属电极）连接，已经实现了石墨烯中自旋输运的各种实验演示。然而，实验结果仍然远低于理论预测值。为了弥补这一差距，提出了两个研究领域：石墨烯的制造和新型器件的设计，以改进基于石墨烯的自旋电子器件，该器件将能够实现更高的数据传输速度、更高的处理能力和存储密度以及更大的存储容量。 PSU 和英特尔的合作伙伴关系将显着促进研究成果向产业的转化。它还将扩大所涉及的研究生和本科生的培训和经验，促进PSU和英特尔科学家之间的积极互动，并在材料科学和设备技术的新兴领域对他们进行培训，在这些领域，基本见解可以带来深刻而快速的实际进展。该项目中代表性不足的本科生的参与将通过正在进行的 NSF 资助的 REU 和 LSAMP 项目、麦克奈尔奖学金项目以及 PSU 的本科生研究和指导项目得到利用。该提案旨在设计和制造新型混合扩散漂移自旋阀(HDDSV) 阵列通过适合行业的流程。所提出的装置将允许通过改变装置组件和尺寸来系统地研究石墨烯自旋输运参数，包括自旋寿命、自旋扩散长度和极化注入效率。用于研究石墨烯自旋输运的非局域自旋阀（NLSV）装置产生的实验值比理论预测值低几个数量级。所提出的HDDSV经过独特设计，可检测源自自旋极化电荷载流子自旋累积的非局部信号，这种信号远离铁磁（FM）/隧道势垒（TB）/石墨烯界面的影响。这项研究工作代表了一种将石墨烯合成、器件制造以及数据测量和分析相结合的多学科方法，以增进对石墨烯自旋输运特性的理解。这项研究的总体目标是解决石墨烯自旋电子学发展的主要障碍。这种新颖的器件配置将能够将铁磁接触的影响与石墨烯自旋输运测量隔离开来，同时能够同时操纵自旋和电荷载流子。所提出的装置将允许检查新的自旋转移现象。对这种新颖器件的研究将揭示铁磁接触和电荷载流子漂移与石墨烯传输通道中自旋扩散长度和自旋寿命的基本影响。学术和工业研究团队互补的专业知识和综合能力保证了所提出目标的成功。

项目成果

Characterization of Graphene Directly Grown at Ni/SiO 2 Interface Using Inductively Coupled Chemical Vapor Deposition (ICP-CVD) at a Low Temperature

使用低温电感耦合化学气相沉积 (ICP-CVD) 表征直接在 Ni/SiO 2 界面生长的石墨烯

• DOI: 10.1017/s1431927620021248
• 发表时间: 2020
• 期刊: Microscopy and Microanalysis
• 影响因子: 2.8
• 作者: Shrestha, Dibyesh;Kolar, Grayson;Jiao, Jun
• 通讯作者: Jiao, Jun

Plasma-Enhanced Chemical Vapor Deposition of Acetylene on Codeposited Bimetal Catalysts Increasing Graphene Sheet Continuity Under Low-Temperature Growth Conditions

• DOI: 10.1186/s11671-019-3156-y
• 发表时间: 2019-10-28
• 期刊: NANOSCALE RESEARCH LETTERS
• 作者: Tracy, Joshua;Zietz, Otto;Jiao, Jun
• 通讯作者: Jiao, Jun

Simulation to fabrication—understanding the effect of NiAuCu alloy catalysts for controlled growth of graphene at reduced temperature

• DOI: 10.1088/2053-1591/ab5bc3
• 发表时间: 2019-11
• 期刊: Materials Research Express
• 影响因子: 2.3
• 作者: H. Zhan;B. Jiang;O. Zietz;Sam Olson;J. Jiao

Self-assembly of exfoliated graphene flakes as anticorrosive coatings for additive manufactured steels

• DOI: 10.1016/j.rsurfi.2023.100116
• 发表时间: 2023-05
• 期刊: Results in Surfaces and Interfaces
• 作者: Kaleb Hood;Wen Qian;Yi Xia;Savannah Krupa;Annie Dao;Sarah Ahmed;Samuel Olsen;Nam Ngyun;J. Turner;J. Jiao

Low-temperature chemical vapor deposition growth of graphene films enabled by ultrathin alloy catalysts

• DOI: 10.1116/1.5144692
• 发表时间: 2020-05-01
• 期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
• 影响因子: 1.4
• 作者: Olson, Samuel;Zietz, Otto;Jiao, Jun
• 通讯作者: Jiao, Jun