CAREER: Approaching the 1D transport limit in van der Waals nanoribbons

职业生涯：接近范德华纳米带的一维输运极限

• 批准号: 1752997
• 负责人: Jiang Wei
• 金额: $ 57.33万
• 依托单位: Tulane University
• 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: 2018-07-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1752997&HistoricalAwards=false
• 关键词: CAREER; Approaching; 1D; transport; limit

Non-technical Abstract: Increasingly powerful and sophisticated devices are needed in an ever-smaller package. Ultimately, a transistor of a size of a single molecule, would truly break the current limits of integration. The progress in this direction of research is slowed by lack of promising molecularly thin wire materials, which are required for both stability and functionality. This work focuses on creating chemically stable and electronically functional molecular wires from so-called van der Waals crystals and studying their fundamental properties. Using this approach, the team aims to reveal new transport behavior in one-dimensional material systems and to explore the possibilities of creating electronic devices for the application. Research activities are seamlessly integrated into science education at various levels, including high school, undergraduate, graduate, and postdoctoral levels, emphasizing on scientific professional development on local underrepresented groups. The PI also builds a comprehensive mentoring system to train undergraduates and graduate students to be the future generations of leaders in science literacy and research.Technical Abstract: This project investigates one-dimensional (1D) transport properties in van der Waals (vdW) nanowire to address critical open questions about transport physics in the 1D limit. VdW nanowires are a new category of 1D material platforms. Their highly anisotropic 1D nature makes them a perfect fit for the study of 1D physics. Fundamental questions to be answered are: 1) How is the power law of conductance manifested in strictly 1D confining vdW nanoribbons? 2) Can the transition between Tomonaga Luttinger liquid (TLL) and 1D Mott insulator be realized in vdW nanoribbons? 3) How does spin-orbit coupling (SOC) modify the transport behavior of TLLs in vdW nanoribbons? 4) Can the temperature range of the Majorana bound state be increased using SOC-enhanced vdW nanoribbons? To address these questions, the research team is conducting the following experiments, centered on vdW nanoribbons: 1) tunneling transport measurements on suspended nanoribbon, 2) momentum resolved spectroscopy on parallel nanoribbons, and 3) detection of the Majorana bound state in semiconducting vdW nanoribbons. This project establishes a new frontier in low-dimensional material research. The pure 1D nature of vdW nanoribbons enables experimental studies in the 1D limit of the single molecular chain. The exploration of critical aspects of 1D electron transport helps to advance the understanding of electron behavior in strictly 1D systems and benefits the theoretical development of 1D transport physics. The measurement methodology proposed in this study applies directly to devices using other novel 1D materials and inspires device research.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.

非技术摘要：越来越强大和复杂的设备需要在一个越来越小的封装。最终，一个单分子大小的晶体管将真正打破目前的集成极限。由于缺乏稳定性和功能性都需要的有前途的分子细线材料，这一研究方向的进展缓慢。这项工作的重点是从所谓的货车德瓦尔斯晶体中产生化学稳定和电子功能的分子导线，并研究其基本性质。使用这种方法，该团队的目标是揭示一维材料系统中的新传输行为，并探索为该应用创建电子设备的可能性。研究活动无缝地融入各级科学教育，包括高中，本科，研究生和博士后水平，强调对当地代表性不足的群体的科学专业发展。PI还建立了一个全面的指导系统，以培养本科生和研究生成为未来几代科学素养和研究的领导者。技术摘要：本项目研究一维（1D）传输性能的货车德瓦尔斯（vdW）纳米线，以解决关键的开放性问题的传输物理在1D限制。VdW纳米线是一类新的一维材料平台。其高度各向异性的一维性质使其非常适合一维物理学的研究。需要回答的基本问题是：1）在严格一维限制的vdW纳米带中，电导的幂律是如何表现的？2)在vdW纳米带中能否实现Tomonaga Luttinger液体（TLL）与一维Mott绝缘体之间的转变？3)自旋轨道耦合（SOC）如何改变vdW纳米带中TLLs的输运行为？4)使用SOC增强的vdW纳米带可以增加Majorana束缚态的温度范围吗？为了解决这些问题，研究小组正在进行以下实验，以vdW纳米带为中心：1）悬浮纳米带的隧道传输测量，2）平行纳米带的动量分辨光谱，以及3）半导体vdW纳米带中Majorana束缚态的检测。该项目开辟了低维材料研究的新前沿。VDW纳米带的纯1D性质使单分子链的1D极限的实验研究成为可能。对一维电子输运关键问题的探索有助于推进对严格一维体系中电子行为的理解，有利于一维输运物理理论的发展。本研究中提出的测量方法直接适用于使用其他新型一维材料的设备，并激发了设备研究。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标准进行评估，被认为值得支持。

项目成果

High yield production of ultrathin fibroid semiconducting nanowire of Ta2Pd3Se8

• DOI: 10.1007/s12274-020-2784-y
• 发表时间: 2020-05-12
• 期刊: NANO RESEARCH
• 影响因子: 9.9
• 作者: Liu, Xue;Liu, Sheng;Wei, Jiang
• 通讯作者: Wei, Jiang