Probing Fundamental Magneto-Electronic Properties of Two-Dimensional Metal Halides
探测二维金属卤化物的基本磁电性质
基本信息
- 批准号:2004420
- 负责人:
- 金额:$ 42万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2020
- 资助国家:美国
- 起止时间:2020-07-01 至 2024-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Nontechnical Summary:Researchers have recently learned how to produce atomically thin materials that are referred to as two-dimensional (2D) materials since they are extended in two dimensions (i.e., length and width) but are confined in the third dimension (i.e., depth) at the atomic scale. Due to a range of superlative properties and new physics in the atomically thin limit, 2D materials have attracted significant interest for fundamental studies and prototype device development. Thus far, chemically inert 2D materials have been the most widely studied since they can be processed in ambient conditions with minimal further precautions. However, the family of 2D materials has hundreds of additional members, which have been underexplored due to their high chemical reactivities that introduce challenges in preparing and handling samples for electronic testing. To address this knowledge gap, this project develops encapsulation and related sample preparation protocols to enable characterization of the fundamental properties of chemically reactive 2D materials. Of particular interest are the 2D metal halides since they are theoretically predicted to possess unique combinations of electronic and magnetic properties that are relevant to next-generation computing and quantum technologies. These research results are widely disseminated to diverse audiences through a series of education and outreach activities including Illuminate, which assists and enables low-income, first-generation, and/or underrepresented minority students to attend and complete college, and Science with Seniors, which organizes visits to retirement homes for interactive science presentations and demonstrations.Technical Summary:Among the most chemically reactive two-dimensional (2D) materials are the layered van der Waals transition metal halides. Due to their high chemical reactivity, experimental studies of bulk metal halides are rare and have traditionally required an inert environment and/or vacuum equipment. However, theoretical models have predicted many layered metal halides to be mechanically exfoliatable due to low cleavage energies and large in-plane bond strength, suggesting that they could be explored in the 2D limit if suitable passivation and processing conditions were identified. This project develops atomic layer deposition encapsulation layers that allow 2D metal halides to be handled, processed, and tested in ambient conditions. Preceding atomic layer deposition, the 2D metal halides are passivated with organic buffer layers that minimize charge trapping and scattering, thus allowing intrinsic properties to be probed. The interplay among the electronic, magnetic, and optical properties of 2D metal halides is characterized as a function of temperature using lateral field-effect transistors, vertical heterostructures, and Hall bar electrode arrays. By elucidating fundamental charge transport phenomena such as the quantized anomalous Hall effect, this work provides guidance to emerging efforts to incorporate 2D metal halides into advanced magneto-electronic applications including spintronic devices, quantum technologies, and non-volatile memory.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.
非技术性总结:研究人员最近已经学会了如何生产原子级薄的材料,这些材料被称为二维(2D)材料,因为它们在二维中延伸(即,长度和宽度)但被限制在第三维(即,在原子尺度上。 由于一系列最高级的性质和原子薄极限的新物理学,2D材料吸引了基础研究和原型器件开发的极大兴趣。到目前为止,化学惰性的2D材料已经得到了最广泛的研究,因为它们可以在环境条件下进行处理,只需最少的进一步预防措施。然而,2D材料家族还有数百个其他成员,由于其高化学反应性,在制备和处理电子测试样品方面带来了挑战,因此尚未得到充分研究。为了解决这一知识差距,该项目开发了封装和相关的样品制备方案,以表征化学反应性2D材料的基本特性。特别令人感兴趣的是2D金属卤化物,因为理论上预测它们具有与下一代计算和量子技术相关的电子和磁性的独特组合。这些研究成果通过一系列的教育和外展活动广泛传播给不同的受众,包括Illuminate,帮助和使低收入,第一代和/或代表性不足的少数民族学生能够参加并完成大学,以及Science with Seniors,组织参观养老院进行互动科学演示和演示。技术摘要:最具化学反应性的二维(2D)材料是层状货车德瓦耳斯过渡金属卤化物。由于它们的高化学反应性,大量金属卤化物的实验研究是罕见的,并且传统上需要惰性环境和/或真空设备。然而,理论模型已经预测许多层状金属卤化物由于低的解理能和大的面内结合强度而可机械剥离,这表明如果确定合适的钝化和加工条件,则可以在2D极限中探索它们。该项目开发原子层沉积封装层,允许在环境条件下处理,加工和测试2D金属卤化物。在原子层沉积之前,用有机缓冲层钝化2D金属卤化物,使电荷捕获和散射最小化,从而允许探测固有特性。二维金属卤化物的电子,磁性和光学性质之间的相互作用的特征在于作为温度的函数,使用横向场效应晶体管,垂直异质结构,和霍尔棒电极阵列。通过阐明基本的电荷传输现象,如量子化的异常霍尔效应,这项工作提供了指导,新兴的努力,将二维金属卤化物纳入先进的磁电子应用,包括自旋电子器件,量子技术,和非该奖项反映了NSF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进行评估,被认为值得支持的搜索.
项目成果
期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Liquid-Phase Exfoliation of Magnetically and Optoelectronically Active Ruthenium Trichloride Nanosheets
- DOI:10.1021/acsnano.2c04888
- 发表时间:2022-06-17
- 期刊:
- 影响因子:17.1
- 作者:Lam, David;Lebedev, Dmitry;Hersam, Mark C.
- 通讯作者:Hersam, Mark C.
Layer-dependent optically induced spin polarization in InSe
- DOI:10.1103/physrevb.107.115304
- 发表时间:2022-12
- 期刊:
- 影响因子:3.7
- 作者:J. Nelson;T. Stanev;Dmitry Lebedev;Trevor LaMountain;J. Gish;Hongfei Zeng;Hyeondeok Shin;O. Heinonen-O
- 通讯作者:J. Nelson;T. Stanev;Dmitry Lebedev;Trevor LaMountain;J. Gish;Hongfei Zeng;Hyeondeok Shin;O. Heinonen-O
Charge transfer dynamics and interlayer exciton formation in MoS2/VOPc mixed dimensional heterojunction
MoS2/VOPc混合维异质结中的电荷转移动力学和层间激子形成
- DOI:10.1063/5.0107791
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Schwinn, Madison C.;Rafiq, Shahnawaz;Lee, Changmin;Bland, Matthew P.;Song, Thomas W.;Sangwan, Vinod K.;Hersam, Mark C.;Chen, Lin X.
- 通讯作者:Chen, Lin X.
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Mark Hersam其他文献
Mark Hersam的其他文献
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{{ truncateString('Mark Hersam', 18)}}的其他基金
Northwestern University Materials Research Science and Engineering Center
西北大学材料研究科学与工程中心
- 批准号:
2308691 - 财政年份:2023
- 资助金额:
$ 42万 - 项目类别:
Cooperative Agreement
EFRI BRAID: Emulating Cerebellar Temporally Coherent Signaling for Ultraefficient Emergent Prediction
EFRI BRAID:模拟小脑时间相干信号以实现超高效紧急预测
- 批准号:
2317974 - 财政年份:2023
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
Collaborative Research: FET: Medium: Neuroplane: Scalable Deep Learning through Gate-tunable MoS2 Crossbars
合作研究:FET:媒介:神经平面:通过门可调 MoS2 交叉开关进行可扩展深度学习
- 批准号:
2106964 - 财政年份:2021
- 资助金额:
$ 42万 - 项目类别:
Continuing Grant
RAPID: Hydrated Graphene Oxide Elastomeric Composites for Sterilizable and Reusable N95 Masks
RAPID:用于可消毒和可重复使用的 N95 口罩的水合氧化石墨烯弹性复合材料
- 批准号:
2029058 - 财政年份:2020
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
MRSEC: Center for Multifunctional Materials
MRSEC:多功能材料中心
- 批准号:
1720139 - 财政年份:2017
- 资助金额:
$ 42万 - 项目类别:
Cooperative Agreement
Solution-Processed Monodisperse Nanoelectronic Heterostructures
溶液处理的单分散纳米电子异质结构
- 批准号:
1505849 - 财政年份:2015
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
REU Site in Nanoscale Science and Engineering
REU 纳米科学与工程网站
- 批准号:
1062784 - 财政年份:2011
- 资助金额:
$ 42万 - 项目类别:
Standard Grant
CEMRI: Multifunctional Nanoscale Material Structures
CEMRI:多功能纳米材料结构
- 批准号:
1121262 - 财政年份:2011
- 资助金额:
$ 42万 - 项目类别:
Cooperative Agreement
Preparation, Characterization, and Application of Monodisperse Carbon-Based Nanomaterials
单分散碳基纳米材料的制备、表征及应用
- 批准号:
1006391 - 财政年份:2010
- 资助金额:
$ 42万 - 项目类别:
Continuing Grant
REU Site in Nanoscale Science and Engineering
REU 纳米科学与工程网站
- 批准号:
0755375 - 财政年份:2008
- 资助金额:
$ 42万 - 项目类别:
Continuing Grant
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