Vector field and pulsed light assisted variable temperature scanning probe microscope for time and space resolved nano-characterisations

矢量场和脉冲光辅助变温扫描探针显微镜，用于时间和空间分辨的纳米表征

• 批准号: EP/M022706/1
• 负责人: Marin Alexe
• 金额: $ 23.93万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FM022706%2F1
• 关键词: Vector; field; pulsed; light; assisted

Our vision is to offer the community an equipment which would allow unique experiments. Scanning probe microscopy (SPM), including both tunnelling and force microscopy, has brought a new class of tools enabling characterisation with lateral resolution at atomic scale. SPM has been a major tool without which the nowadays nanoscience and nanotechnology would have been not possible. We aim to develop an equipment based on the AFM concept which would allow complex characterisation of functional materials. It will offer not only the lateral resolution but also time resolution offered by a short laser pulses, energy resolution by variable temperature and extreme magnetic and electric fields. This SPM, which can be named 5D microscope (3D in real space+1D in time+1D in energy), will open new possibilities to the existing research areas and most probably new research areas. Indubitably, it will have impact to the large field of nanoscience, nanotechnology, and functional materials. Such complex tool does not exist yet, but technology that would make its construction feasible do exist.Besides the "normal" AFM measurement modes under extreme conditions, novel working modes based on particularities of the system, which offers time and space resolved measurements, will be developed. One example of such new developments is the photo-induced transient spectroscopy scanning probe microscopy (PITS-SPM), which can determine recombination centres in photoelectric and photovoltaic materials and devices with spatial resolution approaching the tip-sample contact radius (15-30 nm diameter). The system is designed to be flexible in order to extend the capabilities and meet the specific requirements of potential users. To list few operating modes that might be further developed: photoluminescence spectroscopy, scanning Kerr-effect mode, micro-Raman, vortex imaging, scanning impedance or microwave microscopy, etc. The system would be a genuine open system and shared facility. Top UK and worldwide projects selected solely on the scientific quality will be run on the equipment. The work will be in close cooperation with the managing team which will propose technical and scientific solutions to the users according to the actual experimental goals.The project objectives are:a) Provision of a shared UK resource for variable/low temperature field assisted scanning probe microscopy with performance better than the current state of the art.b) Development of novel time and space resolved measurement techniques for characterization of semiconductor, magnetic, ferroelectric and other functional materials.c) Unprecedented correlated functional and structural studies enabling understanding the origin of effects such as recombination in photovoltaic (perovskite) materials or conduction in topological structures such as surfaces, domain walls, or skyrmions.

我们的愿景是为社区提供一种可以进行独特实验的设备。扫描探针显微镜（SPM），包括隧道和力显微镜，带来了一类新的工具，能够在原子尺度上进行横向分辨率的表征。SPM一直是一个主要的工具，没有它，今天的纳米科学和纳米技术是不可能的。我们的目标是开发一种基于AFM概念的设备，该设备可以对功能材料进行复杂的表征。它不仅可以提供横向分辨率，还可以提供短激光脉冲提供的时间分辨率，可变温度和极端磁场和电场提供的能量分辨率。这种SPM可以被命名为5D显微镜（实空间三维+时间一维+能量一维），将为现有的研究领域开辟新的可能性，并且很可能是新的研究领域。毫无疑问，它将对纳米科学、纳米技术和功能材料等大领域产生影响。这种复杂的工具目前还不存在，但使其构造可行的技术确实存在。除了在极端条件下的“正常”AFM测量模式外，还将开发基于系统特殊性的新型工作模式，以提供时间和空间分辨测量。这种新发展的一个例子是光致瞬态光谱扫描探针显微镜（PITS-SPM），它可以确定光电和光伏材料和器件中的复合中心，其空间分辨率接近尖端样品接触半径（15-30纳米直径）。该系统设计灵活，以便扩展功能并满足潜在用户的特定要求。下面列举几个可能进一步发展的工作模式：光致发光光谱、扫描克尔效应模式、微拉曼、涡旋成像、扫描阻抗或微波显微镜等。该系统将是一个真正的开放系统和共享设施。仅根据科学质量选择的英国和世界顶级项目将在该设备上运行。这项工作将与管理团队密切合作，管理团队将根据实际实验目标向用户提出技术和科学的解决方案。该项目的目标是：a)提供一个共享的英国资源，用于性能优于当前最先进水平的可变/低温场辅助扫描探针显微镜。b)开发用于半导体、磁性、铁电和其他功能材料表征的新型时间和空间分辨测量技术。c)前所未有的相关功能和结构研究，使人们能够理解诸如光伏（钙钛矿）材料中的重组或表面、畴壁或skyrmions等拓扑结构中的传导等效应的起源。

项目成果

Flexible memristors based on single-crystalline ferroelectric tunnel junctions.

• DOI: 10.1021/acsami.9b04738
• 发表时间: 2019-06
• 期刊: ACS applied materials & interfaces
• 影响因子: 9.5
• 作者: Zheng‐Dong Luo;J. J. Peters-J.;A. Sánchez;M. Alexe

Photoelectric processes in ferroelectric/multiferroic materials

铁电/多铁材料的光电过程

• 发表时间: 2018
• 作者: Mingmin Yang

Bi-ferroic memristive properties of multiferroic tunnel junctions

• DOI: 10.1063/1.5023877
• 发表时间: 2018-03
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Zheng‐Dong Luo;G. Apachitei;Ming-Min Yang;J. J. Peters-J.;A. Sánchez;M. Alexe

Light-Controlled Nanoscopic Writing of Electronic Memories Using the Tip-Enhanced Bulk Photovoltaic Effect.

• DOI: 10.1021/acsami.8b22638
• 发表时间: 2019-02
• 期刊: ACS applied materials & interfaces
• 影响因子: 9.5
• 作者: Zheng‐Dong Luo;Dae-Sung Park;Ming-Min Yang;M. Alexe

Antiferroelectric Tunnel Junctions

• DOI: 10.1002/aelm.201700126
• 发表时间: 2017-07-01
• 期刊: ADVANCED ELECTRONIC MATERIALS
• 影响因子: 6.2
• 作者: Apachitei, Geanina;Peters, Jonathan J. P.;Alexe, Marin
• 通讯作者: Alexe, Marin